<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:6ac2d0f2-ac53-42e9-8ab3-1ff8456a1551,g:98f75f5a-aa63-4c9a-a84b-2bdfee81cd78-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://ucbi.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="ucbi-20231231.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestReceivable_60d5cf50-c8f9-4e37-bc86-f3631b951096" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestReceivable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_InterestReceivable_60d5cf50-c8f9-4e37-bc86-f3631b951096" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_067973b6-980f-4411-9eb9-67cafdfdf06e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_067973b6-980f-4411-9eb9-67cafdfdf06e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_600f2276-fbbe-486b-838c-c6a724a5df60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_OtherAssets_600f2276-fbbe-486b-838c-c6a724a5df60" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_8e79cc8c-d508-4b6f-855b-be4b2bc5ed82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_8e79cc8c-d508-4b6f-855b-be4b2bc5ed82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_7d19531f-05da-4051-8978-56af509ecab5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_7d19531f-05da-4051-8978-56af509ecab5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankOwnedLifeInsurance_f3becda5-86f0-4948-8ebf-2e072c7d6c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BankOwnedLifeInsurance"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_BankOwnedLifeInsurance_f3becda5-86f0-4948-8ebf-2e072c7d6c3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_d22abf52-f06b-4f3b-ba8c-3240fc9ee9f5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssets"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_DerivativeAssets_d22abf52-f06b-4f3b-ba8c-3240fc9ee9f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_fc10ee77-c90e-4863-b08e-ebe5147be02c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_fc10ee77-c90e-4863-b08e-ebe5147be02c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_7edf2088-0dd5-41b0-aef4-e07a76576595" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_7edf2088-0dd5-41b0-aef4-e07a76576595" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_46e33fdb-f3b4-4137-9b39-5a224bc34b14" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_46e33fdb-f3b4-4137-9b39-5a224bc34b14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_040977dd-e1dd-4dac-b4ac-146d6e36949f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsAndFederalFundsSold"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_040977dd-e1dd-4dac-b4ac-146d6e36949f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_11348b1e-4d03-435d-9467-4f0e599d9008" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_b54cb891-f94c-48cc-9bd3-526fbb2705f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_11348b1e-4d03-435d-9467-4f0e599d9008" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_0c248b95-ea56-4bdf-be5f-8f2b40d0f7a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Deposits"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestBearingDepositLiabilities_df0ca86d-6d49-42f4-8c52-cb4bd0558bde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestBearingDepositLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Deposits_0c248b95-ea56-4bdf-be5f-8f2b40d0f7a3" xlink:to="loc_us-gaap_NoninterestBearingDepositLiabilities_df0ca86d-6d49-42f4-8c52-cb4bd0558bde" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_afadaa37-6af4-4673-b0f5-fb9f309fb181" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestBearingDepositLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Deposits_0c248b95-ea56-4bdf-be5f-8f2b40d0f7a3" xlink:to="loc_us-gaap_InterestBearingDepositLiabilities_afadaa37-6af4-4673-b0f5-fb9f309fb181" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_010e0270-221e-4d4c-be1a-f285f7dd9b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsAndFederalFundsSold"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndDueFromBanks_7fa779cd-5e20-44da-bb16-632891376ae2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndDueFromBanks"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_010e0270-221e-4d4c-be1a-f285f7dd9b9a" xlink:to="loc_us-gaap_CashAndDueFromBanks_7fa779cd-5e20-44da-bb16-632891376ae2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_FederalFundsSoldAndOtherShortTermInvestments_50f87d7f-23b0-4031-9c7c-72da3e4f4a06" xlink:href="ucbi-20231231.xsd#ucbi_FederalFundsSoldAndOtherShortTermInvestments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_010e0270-221e-4d4c-be1a-f285f7dd9b9a" xlink:to="loc_ucbi_FederalFundsSoldAndOtherShortTermInvestments_50f87d7f-23b0-4031-9c7c-72da3e4f4a06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_dbccffc0-7fd3-463d-911c-d633927b1383" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestBearingDepositsInBanks"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_010e0270-221e-4d4c-be1a-f285f7dd9b9a" xlink:to="loc_us-gaap_InterestBearingDepositsInBanks_dbccffc0-7fd3-463d-911c-d633927b1383" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount_2008cd76-459d-4d0c-bb1c-618ce7adcd23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_us-gaap_PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount_2008cd76-459d-4d0c-bb1c-618ce7adcd23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_bbf419c7-153b-4e3e-84c9-f4ef792ae2e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_us-gaap_AdditionalPaidInCapital_bbf419c7-153b-4e3e-84c9-f4ef792ae2e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_deeb6f5c-23c5-4b51-842e-51c24c9e5028" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_us-gaap_CommonStockValue_deeb6f5c-23c5-4b51-842e-51c24c9e5028" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_70d6e5ca-e87e-4b6a-bb48-a7996dfe00ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_70d6e5ca-e87e-4b6a-bb48-a7996dfe00ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_6786e010-e47e-48ff-9d54-ffd1425c9c52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_6786e010-e47e-48ff-9d54-ffd1425c9c52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_CommonStocksIssuable_976f8bdb-be1c-45ae-bbd0-f775df93e0e5" xlink:href="ucbi-20231231.xsd#ucbi_CommonStocksIssuable"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_9b8c8ca4-585e-4127-95e6-3da4807bc580" xlink:to="loc_ucbi_CommonStocksIssuable_976f8bdb-be1c-45ae-bbd0-f775df93e0e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_7c426a0b-bfad-4d57-ac06-6ef3741fd903" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_d5a03cc3-fbcb-4113-a18a-51098c2b00bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_7c426a0b-bfad-4d57-ac06-6ef3741fd903" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_d5a03cc3-fbcb-4113-a18a-51098c2b00bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_5702c117-e942-4489-832a-b4c6493ed41f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_7c426a0b-bfad-4d57-ac06-6ef3741fd903" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_5702c117-e942-4489-832a-b4c6493ed41f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_7ad12067-a57d-4dd0-9d22-6fac16846cd7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_7ad12067-a57d-4dd0-9d22-6fac16846cd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_be18de5f-f8b9-482b-85e3-f9db1b9f5436" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShortTermBorrowings"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_ShortTermBorrowings_be18de5f-f8b9-482b-85e3-f9db1b9f5436" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_3ff3dea8-3397-4904-9ff2-54fe18fe9685" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_LongTermDebt_3ff3dea8-3397-4904-9ff2-54fe18fe9685" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_784660b8-198d-41da-85a3-8ea511ce1628" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Deposits"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_Deposits_784660b8-198d-41da-85a3-8ea511ce1628" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_382c49c0-2c29-40fb-914a-69dca9f505c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_DerivativeLiabilities_382c49c0-2c29-40fb-914a-69dca9f505c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_6b3a7179-cb0c-4627-a58f-273a36cb65d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdvancesFromFederalHomeLoanBanks"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_9352c71a-119b-4a53-aef4-71f9b7633040" xlink:to="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_6b3a7179-cb0c-4627-a58f-273a36cb65d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_d49b23ba-cb02-42c5-a0f0-65b6ab7db19c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_8a2fa74a-577f-423e-8631-7f6983f400cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d49b23ba-cb02-42c5-a0f0-65b6ab7db19c" xlink:to="loc_us-gaap_StockholdersEquity_8a2fa74a-577f-423e-8631-7f6983f400cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_9feb549c-03c1-4749-8f30-c7fc7751fd44" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d49b23ba-cb02-42c5-a0f0-65b6ab7db19c" xlink:to="loc_us-gaap_Liabilities_9feb549c-03c1-4749-8f30-c7fc7751fd44" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_93a53cfd-1ac0-479a-bee3-e694dddcafcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d49b23ba-cb02-42c5-a0f0-65b6ab7db19c" xlink:to="loc_us-gaap_CommitmentsAndContingencies_93a53cfd-1ac0-479a-bee3-e694dddcafcf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/ConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="ucbi-20231231.xsd#ConsolidatedStatementsofIncome"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/ConsolidatedStatementsofIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_a3d44e14-4cdd-4dd6-bfce-594eb4e221bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_LaborAndRelatedExpense_a3d44e14-4cdd-4dd6-bfce-594eb4e221bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_53c56304-9b26-4de3-ae60-2eec16bcf6c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OccupancyNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_OccupancyNet_53c56304-9b26-4de3-ae60-2eec16bcf6c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommunicationsAndInformationTechnology_c690edff-5297-4d00-84de-1d901eb70039" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommunicationsAndInformationTechnology"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_CommunicationsAndInformationTechnology_c690edff-5297-4d00-84de-1d901eb70039" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_bf660d9c-9278-42d0-9dd3-e9e870f8b025" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfessionalFees"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_ProfessionalFees_bf660d9c-9278-42d0-9dd3-e9e870f8b025" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanPortfolioExpense_b716e6d9-b564-4f79-8d83-b09ff148d3a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoanPortfolioExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_LoanPortfolioExpense_b716e6d9-b564-4f79-8d83-b09ff148d3a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_NoninterestExpenseOutsideServicesElectronicBanking_afe1e296-f879-4b39-95b6-c909ea73d1c6" xlink:href="ucbi-20231231.xsd#ucbi_NoninterestExpenseOutsideServicesElectronicBanking"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_ucbi_NoninterestExpenseOutsideServicesElectronicBanking_afe1e296-f879-4b39-95b6-c909ea73d1c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SuppliesAndPostageExpense_b510bdc8-b336-4381-9d8a-4ae2667562b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SuppliesAndPostageExpense"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_SuppliesAndPostageExpense_b510bdc8-b336-4381-9d8a-4ae2667562b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_595702a1-3086-4759-8536-bc4be3f63fd1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketingAndAdvertisingExpense"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_595702a1-3086-4759-8536-bc4be3f63fd1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_7cc33cfa-c314-42d6-8830-e66d4388fa31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FederalDepositInsuranceCorporationPremiumExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_7cc33cfa-c314-42d6-8830-e66d4388fa31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_041571f8-8921-477d-9282-93ee680e62d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_041571f8-8921-477d-9282-93ee680e62d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_40cb0b7c-237f-439e-a857-25de46582ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_40cb0b7c-237f-439e-a857-25de46582ea9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoninterestExpense_5e52ce97-9fb2-4a3c-9cb9-be2f9a13d291" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoninterestExpense"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_8f11d949-0fa2-44c2-a522-8340b7af3a19" xlink:to="loc_us-gaap_OtherNoninterestExpense_5e52ce97-9fb2-4a3c-9cb9-be2f9a13d291" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_dd3a83db-94af-441e-b09c-11394b10fee5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_c5758fdc-a640-40c2-bb54-419462865a15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_dd3a83db-94af-441e-b09c-11394b10fee5" xlink:to="loc_us-gaap_Revenues_c5758fdc-a640-40c2-bb54-419462865a15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_50e05a95-69e4-4793-b763-32b92da4ab6e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_dd3a83db-94af-441e-b09c-11394b10fee5" xlink:to="loc_us-gaap_NoninterestExpense_50e05a95-69e4-4793-b763-32b92da4ab6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOther_4d477fb2-1a2a-4cd4-95d3-a6a72f66486b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncomeOther"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_us-gaap_NoninterestIncomeOther_4d477fb2-1a2a-4cd4-95d3-a6a72f66486b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions_806552da-ba2b-4c58-8a76-f872027ec904" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_us-gaap_InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions_806552da-ba2b-4c58-8a76-f872027ec904" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfLoansNet_9748a8a5-2e0a-46c8-a220-024b131f81db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSalesOfLoansNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_us-gaap_GainLossOnSalesOfLoansNet_9748a8a5-2e0a-46c8-a220-024b131f81db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherLendingAndLoanServicingFees_485fdfbf-a49b-4d81-b1f9-2dee8042dc5d" xlink:href="ucbi-20231231.xsd#ucbi_OtherLendingAndLoanServicingFees"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_ucbi_OtherLendingAndLoanServicingFees_485fdfbf-a49b-4d81-b1f9-2dee8042dc5d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_da8f571d-d115-410a-ba91-7648f9d78e5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_da8f571d-d115-410a-ba91-7648f9d78e5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_9e8d7f6d-d39e-4077-9331-03420d0bbbb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_6238b3c9-a912-414c-971e-cab1fdf48eee" xlink:to="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_9e8d7f6d-d39e-4077-9331-03420d0bbbb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_d476e106-af6d-4e3e-93fc-f4fda17b7fba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDeposits_4aa2a9e5-2c3d-4265-9e97-bde875b3ee58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseDeposits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_d476e106-af6d-4e3e-93fc-f4fda17b7fba" xlink:to="loc_us-gaap_InterestExpenseDeposits_4aa2a9e5-2c3d-4265-9e97-bde875b3ee58" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOtherShortTermBorrowings_cc53bc97-3ea3-482a-9792-fb73088de125" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseOtherShortTermBorrowings"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_d476e106-af6d-4e3e-93fc-f4fda17b7fba" xlink:to="loc_us-gaap_InterestExpenseOtherShortTermBorrowings_cc53bc97-3ea3-482a-9792-fb73088de125" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm_5ffef125-8820-47bb-90c1-f27a51ff28a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_d476e106-af6d-4e3e-93fc-f4fda17b7fba" xlink:to="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm_5ffef125-8820-47bb-90c1-f27a51ff28a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseLongTermDebt_1a139abe-e288-4596-82f1-366e03231a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseLongTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_d476e106-af6d-4e3e-93fc-f4fda17b7fba" xlink:to="loc_us-gaap_InterestExpenseLongTermDebt_1a139abe-e288-4596-82f1-366e03231a4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_e7d760f0-f733-4f5f-92c9-cf8490a3883e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_6b724b32-4511-4bb8-955e-09930d3d5606" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_e7d760f0-f733-4f5f-92c9-cf8490a3883e" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_6b724b32-4511-4bb8-955e-09930d3d5606" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxable_dcc5d875-83b3-4f35-8f4c-5dcc00f43a9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeSecuritiesTaxable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_e7d760f0-f733-4f5f-92c9-cf8490a3883e" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxable_dcc5d875-83b3-4f35-8f4c-5dcc00f43a9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_5e0afc10-796b-40ba-9fae-27fbc7006293" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeSecuritiesTaxExempt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_e7d760f0-f733-4f5f-92c9-cf8490a3883e" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_5e0afc10-796b-40ba-9fae-27fbc7006293" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_FederalFundsSoldCommercialPaperAndDepositsInBanks_3eefd34c-8140-4d4f-93a6-374209783ffe" xlink:href="ucbi-20231231.xsd#ucbi_FederalFundsSoldCommercialPaperAndDepositsInBanks"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_e7d760f0-f733-4f5f-92c9-cf8490a3883e" xlink:to="loc_ucbi_FederalFundsSoldCommercialPaperAndDepositsInBanks_3eefd34c-8140-4d4f-93a6-374209783ffe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_a9d0f77b-c371-4351-a6ac-c6d0b999da44" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_30289a78-02fc-4fbb-a8ab-c33549c9bbb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_a9d0f77b-c371-4351-a6ac-c6d0b999da44" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_30289a78-02fc-4fbb-a8ab-c33549c9bbb2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_97253796-af9f-4e9e-adaa-6038f7e94346" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_a9d0f77b-c371-4351-a6ac-c6d0b999da44" xlink:to="loc_us-gaap_InterestExpense_97253796-af9f-4e9e-adaa-6038f7e94346" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_edd5ebb6-c53f-4961-b6a8-5fb16dc2929f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_c107b977-3728-4c2c-a54a-809056501b79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_edd5ebb6-c53f-4961-b6a8-5fb16dc2929f" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_c107b977-3728-4c2c-a54a-809056501b79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_d39250ec-6012-4523-92fa-ad3ce73549e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_edd5ebb6-c53f-4961-b6a8-5fb16dc2929f" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_d39250ec-6012-4523-92fa-ad3ce73549e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_8258e755-e9e2-4926-acb6-6c9db3d9e5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_85981961-958d-4439-b74b-01bee7ff9a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_8258e755-e9e2-4926-acb6-6c9db3d9e5ec" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_85981961-958d-4439-b74b-01bee7ff9a0c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_05a727a5-8db2-4f3c-87e5-d8141b6b071a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoninterestIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_8258e755-e9e2-4926-acb6-6c9db3d9e5ec" xlink:to="loc_us-gaap_NoninterestIncome_05a727a5-8db2-4f3c-87e5-d8141b6b071a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_80879edf-de14-440f-9f6d-0e90b17a4299" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_1e1e42a8-cfe0-4cda-85e3-0fae0e6623e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_80879edf-de14-440f-9f6d-0e90b17a4299" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_1e1e42a8-cfe0-4cda-85e3-0fae0e6623e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_09e661be-6292-4e59-8b30-1c2ccc1fc7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_80879edf-de14-440f-9f6d-0e90b17a4299" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_09e661be-6292-4e59-8b30-1c2ccc1fc7e7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="simple" xlink:href="ucbi-20231231.xsd#ConsolidatedStatementsofComprehensiveIncomeLoss"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5f2a985b-2b83-4bc3-93e1-4d146bc48302" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0baf735b-1682-4a2c-87f7-a752fdb4b799" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5f2a985b-2b83-4bc3-93e1-4d146bc48302" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0baf735b-1682-4a2c-87f7-a752fdb4b799" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_6778be09-fa5f-46bc-a4c3-7acba0fbc4c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5f2a985b-2b83-4bc3-93e1-4d146bc48302" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_6778be09-fa5f-46bc-a4c3-7acba0fbc4c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_2959f7ad-2654-45ca-aded-d46568d45bbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_4a9eb28a-fcc5-4004-8de3-89fd9bc0834f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_2959f7ad-2654-45ca-aded-d46568d45bbe" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_4a9eb28a-fcc5-4004-8de3-89fd9bc0834f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_cd6d6ef6-f6b0-4c5b-bbb3-4779712cfde8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_2959f7ad-2654-45ca-aded-d46568d45bbe" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_cd6d6ef6-f6b0-4c5b-bbb3-4779712cfde8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_8c3dc6fa-5e36-4099-a9ff-31269d40ee42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_3d55060e-8610-4e49-bc2c-4b0c88afe386" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_8c3dc6fa-5e36-4099-a9ff-31269d40ee42" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_3d55060e-8610-4e49-bc2c-4b0c88afe386" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_6aa58c1c-e736-48a9-8f6e-488568d74903" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_8c3dc6fa-5e36-4099-a9ff-31269d40ee42" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_6aa58c1c-e736-48a9-8f6e-488568d74903" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a3fe6586-48e1-44f7-8d30-25128610e484" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_44e38d4a-596b-499d-b410-e8a8c0e5f532" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a3fe6586-48e1-44f7-8d30-25128610e484" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_44e38d4a-596b-499d-b410-e8a8c0e5f532" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_18116e34-3454-4cca-a9d9-499510e69e6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a3fe6586-48e1-44f7-8d30-25128610e484" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_18116e34-3454-4cca-a9d9-499510e69e6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax_e6eb3398-3e7f-4568-9477-4aa45a119fd6" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a3fe6586-48e1-44f7-8d30-25128610e484" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax_e6eb3398-3e7f-4568-9477-4aa45a119fd6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_07351437-752c-4fc4-8361-57101882c4e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a3fe6586-48e1-44f7-8d30-25128610e484" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_07351437-752c-4fc4-8361-57101882c4e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_3ab10652-3d06-42b3-8386-402a5cb5b50a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_241c3a36-772a-471e-b883-daafcc4a6556" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_3ab10652-3d06-42b3-8386-402a5cb5b50a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_241c3a36-772a-471e-b883-daafcc4a6556" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_a2df15d2-e826-448f-95f8-2e02aabfeda5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_3ab10652-3d06-42b3-8386-402a5cb5b50a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_a2df15d2-e826-448f-95f8-2e02aabfeda5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_251c3337-0f53-445e-89b2-ba6b2c67d64e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax_f67f6c52-38f7-4595-894c-53ac933c6754" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_251c3337-0f53-445e-89b2-ba6b2c67d64e" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax_f67f6c52-38f7-4595-894c-53ac933c6754" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_06327d23-9323-4c55-aa36-e3b0c53262c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_251c3337-0f53-445e-89b2-ba6b2c67d64e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_06327d23-9323-4c55-aa36-e3b0c53262c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_ce1b7a74-150f-4a49-81fb-89378babb1f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_251c3337-0f53-445e-89b2-ba6b2c67d64e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_ce1b7a74-150f-4a49-81fb-89378babb1f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_df69470e-9d1d-4d1a-ba08-101addad0411" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_2dd7f3e5-1f7f-4f21-995f-ca1888f92570" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_df69470e-9d1d-4d1a-ba08-101addad0411" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_2dd7f3e5-1f7f-4f21-995f-ca1888f92570" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_25442144-0c64-42d7-97cb-462df8bdb387" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_df69470e-9d1d-4d1a-ba08-101addad0411" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_25442144-0c64-42d7-97cb-462df8bdb387" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ComprehensiveIncomeLossBeforeTax_9a538f28-bcdb-49f7-855b-a1105d24d8d8" xlink:href="ucbi-20231231.xsd#ucbi_ComprehensiveIncomeLossBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_37cff9e3-eeca-4226-bf29-b3dd7d663cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_ComprehensiveIncomeLossBeforeTax_9a538f28-bcdb-49f7-855b-a1105d24d8d8" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_37cff9e3-eeca-4226-bf29-b3dd7d663cd6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a596d208-0245-43e4-b501-1560ff079e12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_ComprehensiveIncomeLossBeforeTax_9a538f28-bcdb-49f7-855b-a1105d24d8d8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_a596d208-0245-43e4-b501-1560ff079e12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax_e8291cee-e1d0-4c35-9484-95a489d3b51b" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax_c08999da-9771-4733-93b6-0eb649463a32" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax_e8291cee-e1d0-4c35-9484-95a489d3b51b" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax_c08999da-9771-4733-93b6-0eb649463a32" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax_40c7df1d-4032-4c60-a4f6-1b90d9035f14" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax_e8291cee-e1d0-4c35-9484-95a489d3b51b" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax_40c7df1d-4032-4c60-a4f6-1b90d9035f14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_8017c153-72d6-40f7-b503-83bec1f2e944" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_3e898384-cc99-4f00-9529-f54043f501a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_8017c153-72d6-40f7-b503-83bec1f2e944" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_3e898384-cc99-4f00-9529-f54043f501a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_8c19a204-3389-4b46-989c-e62c8ca9379a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_8017c153-72d6-40f7-b503-83bec1f2e944" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_8c19a204-3389-4b46-989c-e62c8ca9379a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_b2119f12-1404-4c3b-a3e1-8ac70a7ee43e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_aea3516d-60ca-4ff5-a299-0a831c019387" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_b2119f12-1404-4c3b-a3e1-8ac70a7ee43e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_aea3516d-60ca-4ff5-a299-0a831c019387" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax_50aa2336-5b63-4993-b9f9-bd1b0cd79458" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_b2119f12-1404-4c3b-a3e1-8ac70a7ee43e" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax_50aa2336-5b63-4993-b9f9-bd1b0cd79458" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_2a0472e8-512d-4b4b-9981-9c57d09a0552" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_b2119f12-1404-4c3b-a3e1-8ac70a7ee43e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_2a0472e8-512d-4b4b-9981-9c57d09a0552" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_4b941d4c-5f90-4f2a-814b-954e721c5489" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_262ee2d3-c232-4b87-b514-1555208ac784" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_4b941d4c-5f90-4f2a-814b-954e721c5489" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_262ee2d3-c232-4b87-b514-1555208ac784" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6b8935ed-e573-4f58-a519-4562408d38db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_4b941d4c-5f90-4f2a-814b-954e721c5489" xlink:to="loc_us-gaap_NetIncomeLoss_6b8935ed-e573-4f58-a519-4562408d38db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax_85adf78f-be22-4145-9b92-8881d0cab9c6" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount_896cd88a-76e8-4688-8413-da17290d8513" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax_85adf78f-be22-4145-9b92-8881d0cab9c6" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount_896cd88a-76e8-4688-8413-da17290d8513" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1_d9791e5c-16e4-4a67-b670-5e739a20e944" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax_85adf78f-be22-4145-9b92-8881d0cab9c6" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1_d9791e5c-16e4-4a67-b670-5e739a20e944" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_64f7a678-9a54-414e-b73c-59f0bde3f274" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_6eabcda6-2245-4445-a0f0-6da41cb29e08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_64f7a678-9a54-414e-b73c-59f0bde3f274" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_6eabcda6-2245-4445-a0f0-6da41cb29e08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount_ffbc2067-9e33-48ae-9065-0e018104b315" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_64f7a678-9a54-414e-b73c-59f0bde3f274" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount_ffbc2067-9e33-48ae-9065-0e018104b315" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_12e11f26-2771-4f28-a1f6-2525d52c758b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_b706608d-c3e6-42d7-b324-038edf546852" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_12e11f26-2771-4f28-a1f6-2525d52c758b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_b706608d-c3e6-42d7-b324-038edf546852" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_c23b8817-0634-4cd3-9aaa-d8b52961d046" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_12e11f26-2771-4f28-a1f6-2525d52c758b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_c23b8817-0634-4cd3-9aaa-d8b52961d046" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_9985e4be-c180-40eb-a66f-cafac779ff4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_56d1f95c-5081-491f-bd50-7b5462019f4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_9985e4be-c180-40eb-a66f-cafac779ff4f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_56d1f95c-5081-491f-bd50-7b5462019f4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_ef7839ee-0198-44ee-b32b-48ba478105fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_9985e4be-c180-40eb-a66f-cafac779ff4f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_ef7839ee-0198-44ee-b32b-48ba478105fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_4f0c87a8-aef6-44c9-b63c-34364bff3319" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_743ea7f8-5495-4cdb-addf-dfa5bb9440d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_4f0c87a8-aef6-44c9-b63c-34364bff3319" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_743ea7f8-5495-4cdb-addf-dfa5bb9440d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_4f3fff6b-e666-423f-8c6b-d3a3cd818b47" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_4f0c87a8-aef6-44c9-b63c-34364bff3319" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_4f3fff6b-e666-423f-8c6b-d3a3cd818b47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax_702a6e46-b6fc-4e1d-ac76-ed40e565b8e4" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_4f0c87a8-aef6-44c9-b63c-34364bff3319" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax_702a6e46-b6fc-4e1d-ac76-ed40e565b8e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_6d6505c9-c029-45fb-9654-0b75d5cda037" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_4f0c87a8-aef6-44c9-b63c-34364bff3319" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax_6d6505c9-c029-45fb-9654-0b75d5cda037" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8e83ae31-4a77-47e9-9837-a48832c75a07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_4f4b1e83-2db5-48b8-930f-1b419f15d956" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8e83ae31-4a77-47e9-9837-a48832c75a07" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_4f4b1e83-2db5-48b8-930f-1b419f15d956" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_ed748445-f046-467e-896d-e168a99c4edb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8e83ae31-4a77-47e9-9837-a48832c75a07" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_ed748445-f046-467e-896d-e168a99c4edb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax_c3b38640-986c-4269-a608-7519c7fdc75e" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax_170d134b-1716-4992-9161-e1c0eafa8204" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax_c3b38640-986c-4269-a608-7519c7fdc75e" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax_170d134b-1716-4992-9161-e1c0eafa8204" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax_ce4f98c9-4c8f-49d7-9d8d-0c3cde8711c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax_c3b38640-986c-4269-a608-7519c7fdc75e" xlink:to="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax_ce4f98c9-4c8f-49d7-9d8d-0c3cde8711c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_6b351804-c726-49f4-bf41-727b83dc7a14" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_bd931331-dfed-4266-b02a-e83a5b4acef2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_6b351804-c726-49f4-bf41-727b83dc7a14" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_bd931331-dfed-4266-b02a-e83a5b4acef2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1_0d57ff2e-2428-4d06-875a-2523e2182269" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_6b351804-c726-49f4-bf41-727b83dc7a14" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1_0d57ff2e-2428-4d06-875a-2523e2182269" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax_966a2072-af42-416d-b276-03adbe952924" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax_2a976bea-e224-417b-928e-8cc7337417b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax_966a2072-af42-416d-b276-03adbe952924" xlink:to="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax_2a976bea-e224-417b-928e-8cc7337417b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax_95021e0b-bc6d-46a9-8ba4-fb0393ce112c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax_966a2072-af42-416d-b276-03adbe952924" xlink:to="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax_95021e0b-bc6d-46a9-8ba4-fb0393ce112c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax_dd1b3af2-a7df-4c5a-af1f-d46edf1a4d87" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax_1a3ee0fe-9f8c-4f14-9ab0-7a06444478d0" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax_dd1b3af2-a7df-4c5a-af1f-d46edf1a4d87" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax_1a3ee0fe-9f8c-4f14-9ab0-7a06444478d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax_74b52fa1-4070-4682-b747-3a3066009d10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax_dd1b3af2-a7df-4c5a-af1f-d46edf1a4d87" xlink:to="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossTax_74b52fa1-4070-4682-b747-3a3066009d10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_483b4bbb-c851-46ba-9388-eecba797e924" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_1dc7bae8-5f44-47ba-b206-d8a21001d35d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_483b4bbb-c851-46ba-9388-eecba797e924" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_1dc7bae8-5f44-47ba-b206-d8a21001d35d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_f9ca7085-7c4f-4507-b1df-7194291ed876" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_483b4bbb-c851-46ba-9388-eecba797e924" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_f9ca7085-7c4f-4507-b1df-7194291ed876" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax_191fd80e-6856-486d-a86c-d4d0f648495b" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax_11ca3a90-d5e4-4314-9d0e-02d2def99ad0" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax_191fd80e-6856-486d-a86c-d4d0f648495b" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityBeforeTax_11ca3a90-d5e4-4314-9d0e-02d2def99ad0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax_efd8dd8c-69cf-49bc-9910-305bfc6065b1" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax_191fd80e-6856-486d-a86c-d4d0f648495b" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityTax_efd8dd8c-69cf-49bc-9910-305bfc6065b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax_ce433df2-c196-45fc-930b-9636cc5e11d0" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax_35bafdbe-08f4-4e8f-85d6-1dbeff201a8d" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax_ce433df2-c196-45fc-930b-9636cc5e11d0" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterTax_35bafdbe-08f4-4e8f-85d6-1dbeff201a8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax_ae613d62-82f9-412f-8fb5-02f7d8cb0939" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax_ce433df2-c196-45fc-930b-9636cc5e11d0" xlink:to="loc_us-gaap_OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax_ae613d62-82f9-412f-8fb5-02f7d8cb0939" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_518257cb-b3ea-4a0a-8884-400e139cdbfc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_67c7f9e8-4fa1-4fbc-8325-c0ce5ea655de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_518257cb-b3ea-4a0a-8884-400e139cdbfc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_67c7f9e8-4fa1-4fbc-8325-c0ce5ea655de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_eb905318-ee92-4931-a3d0-a9c9af5d0f82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_518257cb-b3ea-4a0a-8884-400e139cdbfc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_eb905318-ee92-4931-a3d0-a9c9af5d0f82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ComprehensiveIncomeLossTax_33d8826a-bd36-441e-8ad6-bdbc785d5b3d" xlink:href="ucbi-20231231.xsd#ucbi_ComprehensiveIncomeLossTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_cda32d50-fb79-4f3e-ae71-93f98aaf8768" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_ComprehensiveIncomeLossTax_33d8826a-bd36-441e-8ad6-bdbc785d5b3d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_cda32d50-fb79-4f3e-ae71-93f98aaf8768" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ebbe4484-7a3c-4ba5-a637-34af5ac7e94e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_ComprehensiveIncomeLossTax_33d8826a-bd36-441e-8ad6-bdbc785d5b3d" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_ebbe4484-7a3c-4ba5-a637-34af5ac7e94e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss_1" xlink:type="simple" xlink:href="ucbi-20231231.xsd#ConsolidatedStatementsofComprehensiveIncomeLoss_1"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_fd00f2d1-6a91-472f-bb2b-9a088ae806aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_a3077dc6-be98-4f85-9078-a9b9f0a42ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_fd00f2d1-6a91-472f-bb2b-9a088ae806aa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_a3077dc6-be98-4f85-9078-a9b9f0a42ec7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_1545020c-f3fa-49dd-9675-74923a28045d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_fd00f2d1-6a91-472f-bb2b-9a088ae806aa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_1545020c-f3fa-49dd-9675-74923a28045d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_4f6f6d3e-c213-4bc5-ac16-93408ae9ff77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_1eee3f98-86d8-4b0c-afda-a00a0b20a0f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_4f6f6d3e-c213-4bc5-ac16-93408ae9ff77" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_1eee3f98-86d8-4b0c-afda-a00a0b20a0f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax_f65bca35-4a6a-4954-94db-6139ae819c9e" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_4f6f6d3e-c213-4bc5-ac16-93408ae9ff77" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax_f65bca35-4a6a-4954-94db-6139ae819c9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_b952ec52-050f-47ed-ae0a-ba149197954e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax_4c169f80-00e6-4795-b08c-07a149b6ae3d" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_b952ec52-050f-47ed-ae0a-ba149197954e" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax_4c169f80-00e6-4795-b08c-07a149b6ae3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_58ec8a70-9f15-4075-8f11-3ee0355dfc6a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_b952ec52-050f-47ed-ae0a-ba149197954e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_58ec8a70-9f15-4075-8f11-3ee0355dfc6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8f842bfc-0f31-4290-92ce-66dcb07c0f50" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_b952ec52-050f-47ed-ae0a-ba149197954e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_8f842bfc-0f31-4290-92ce-66dcb07c0f50" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_ec025dc1-2d29-494c-977e-563a70228a58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ComprehensiveIncomeLossBeforeTax_18c5400e-c262-4a0c-8433-5a3e582c09a0" xlink:href="ucbi-20231231.xsd#ucbi_ComprehensiveIncomeLossBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_ec025dc1-2d29-494c-977e-563a70228a58" xlink:to="loc_ucbi_ComprehensiveIncomeLossBeforeTax_18c5400e-c262-4a0c-8433-5a3e582c09a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ComprehensiveIncomeLossTax_e14c5dcb-ee97-4ab8-94f3-049070a2c5be" xlink:href="ucbi-20231231.xsd#ucbi_ComprehensiveIncomeLossTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_ec025dc1-2d29-494c-977e-563a70228a58" xlink:to="loc_ucbi_ComprehensiveIncomeLossTax_e14c5dcb-ee97-4ab8-94f3-049070a2c5be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b2410b11-15bb-4f6a-9461-520f1cb8c39d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_04154dc1-8605-4a75-8e18-76150d7fe8dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b2410b11-15bb-4f6a-9461-520f1cb8c39d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_04154dc1-8605-4a75-8e18-76150d7fe8dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_89e2bb51-f613-4e21-aec6-c615fa6390d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b2410b11-15bb-4f6a-9461-520f1cb8c39d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_89e2bb51-f613-4e21-aec6-c615fa6390d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_b4135597-48fa-4333-a05f-bd2f41918555" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b2410b11-15bb-4f6a-9461-520f1cb8c39d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_b4135597-48fa-4333-a05f-bd2f41918555" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax_a5236730-8503-47af-a84f-31a89ae90194" xlink:href="ucbi-20231231.xsd#ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b2410b11-15bb-4f6a-9461-520f1cb8c39d" xlink:to="loc_ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax_a5236730-8503-47af-a84f-31a89ae90194" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="ucbi-20231231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ProceedsFromOtherFinancingActivities_156bf6dc-974c-4603-87a1-85aced484168" xlink:href="ucbi-20231231.xsd#ucbi_ProceedsFromOtherFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_ucbi_ProceedsFromOtherFinancingActivities_156bf6dc-974c-4603-87a1-85aced484168" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfOtherLongTermDebt_6d7e65c3-3f9a-4b8c-a873-ed83ae0606e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfOtherLongTermDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_RepaymentsOfOtherLongTermDebt_6d7e65c3-3f9a-4b8c-a873-ed83ae0606e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_PaymentsForOtherFinancingActivities_f5a6c362-687e-4689-b259-e692238b1291" xlink:href="ucbi-20231231.xsd#ucbi_PaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_ucbi_PaymentsForOtherFinancingActivities_f5a6c362-687e-4689-b259-e692238b1291" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_6e977b27-03b2-4b9c-868f-c7fb4f8dba83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_6e977b27-03b2-4b9c-868f-c7fb4f8dba83" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_78eeb140-d5f6-4474-a82d-104a7e717aa8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_78eeb140-d5f6-4474-a82d-104a7e717aa8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_c9502fd6-14f8-473c-afa4-f5ce2aa53500" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromFederalHomeLoanBankBorrowings"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_c9502fd6-14f8-473c-afa4-f5ce2aa53500" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeposits_399f63fd-ca4d-4bbf-8601-fdf071a2ac27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInDeposits"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_IncreaseDecreaseInDeposits_399f63fd-ca4d-4bbf-8601-fdf071a2ac27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_3257da5a-cc59-4638-85e0-38597d42d7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_3257da5a-cc59-4638-85e0-38597d42d7a2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_cccde881-5a6d-49b9-9edf-82cb08aea662" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_cccde881-5a6d-49b9-9edf-82cb08aea662" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_44155abc-4a09-4857-b435-ec92a9831332" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_44155abc-4a09-4857-b435-ec92a9831332" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_3cffd948-bc73-433c-82e6-82b312c48c63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7853d32f-e659-435e-93a4-e08786c16724" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfPreferredStockAndPreferenceStock_3cffd948-bc73-433c-82e6-82b312c48c63" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_95c1bd13-3641-4b9d-8918-6d77498da015" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_95c1bd13-3641-4b9d-8918-6d77498da015" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_4f03d092-f7b4-44c2-a385-c41180511f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_4f03d092-f7b4-44c2-a385-c41180511f7e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_f16b18a2-7deb-4a3c-808c-1b25686d59d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_f16b18a2-7deb-4a3c-808c-1b25686d59d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_4e003637-0a03-4da6-ada0-ca1fab8cf9f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_4e003637-0a03-4da6-ada0-ca1fab8cf9f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_e5ba4d4e-9701-46a8-aa56-b7ab1e5cfdcb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_e5ba4d4e-9701-46a8-aa56-b7ab1e5cfdcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_5eedd979-6f03-4da4-be2e-5ae038e2e5c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromLoansAndLeases"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_5eedd979-6f03-4da4-be2e-5ae038e2e5c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_f938a94b-bfe2-43de-a269-5d1ac5d24352" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireOtherInvestments"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsToAcquireOtherInvestments_f938a94b-bfe2-43de-a269-5d1ac5d24352" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_de818bff-ced1-4e69-b304-b1fc79bab019" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfOtherInvestments"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_de818bff-ced1-4e69-b304-b1fc79bab019" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_480b6f09-b1b7-42bd-9184-de8aef457296" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_480b6f09-b1b7-42bd-9184-de8aef457296" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_38d542ec-a0db-4f18-81e4-4cf5a170bf4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_38d542ec-a0db-4f18-81e4-4cf5a170bf4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_c45a46ae-ab8a-4749-ae31-d9d1046536df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_c45a46ae-ab8a-4749-ae31-d9d1046536df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_PaymentsForOtherInvestingActivities_399c022a-706e-490b-a510-6be3007d0a8f" xlink:href="ucbi-20231231.xsd#ucbi_PaymentsForOtherInvestingActivities"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_ucbi_PaymentsForOtherInvestingActivities_399c022a-706e-490b-a510-6be3007d0a8f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ProceedsFromOtherInvestingActivities_f80c1612-88dd-499e-96ba-04e083500528" xlink:href="ucbi-20231231.xsd#ucbi_ProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_ucbi_ProceedsFromOtherInvestingActivities_f80c1612-88dd-499e-96ba-04e083500528" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_PaymentsForBranchDisposalInvestingActivities_1a66d692-5d0b-48a9-9f24-b058cf95d7ea" xlink:href="ucbi-20231231.xsd#ucbi_PaymentsForBranchDisposalInvestingActivities"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_30fcbb3a-cc3e-4866-980a-0ea0084c968e" xlink:to="loc_ucbi_PaymentsForBranchDisposalInvestingActivities_1a66d692-5d0b-48a9-9f24-b058cf95d7ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c07a254a-6b46-48df-b33f-16052641f579" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_NetIncomeLoss_c07a254a-6b46-48df-b33f-16052641f579" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_01945559-a2dc-40d8-a44d-5c0502ebea1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_01945559-a2dc-40d8-a44d-5c0502ebea1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_12276a8e-ff21-4009-b7d8-ac536a602876" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_12276a8e-ff21-4009-b7d8-ac536a602876" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_96b42c78-8d6a-465f-9775-c77367f439c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_ShareBasedCompensation_96b42c78-8d6a-465f-9775-c77367f439c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e3c8e61e-1f07-416a-b592-123a1e1d0828" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_e3c8e61e-1f07-416a-b592-123a1e1d0828" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_550e8e52-c8b0-4811-ac38-9ce69fc7e613" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_550e8e52-c8b0-4811-ac38-9ce69fc7e613" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfLoansAndLeases_d2e9ef78-5801-42c1-94b5-ec10c709b22e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfLoansAndLeases"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_GainLossOnSaleOfLoansAndLeases_d2e9ef78-5801-42c1-94b5-ec10c709b22e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_a6c59bd0-ad09-4626-bc8f-d5c1ae3c07eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_a6c59bd0-ad09-4626-bc8f-d5c1ae3c07eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_15e64e20-5184-432f-ba73-11ab5084ce9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_15e64e20-5184-432f-ba73-11ab5084ce9d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInLoansHeldForSale_23ae7221-2914-4656-a07e-3c46169ecf3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInLoansHeldForSale"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6b749f17-ef8c-438b-aeab-0e1837022a7f" xlink:to="loc_us-gaap_IncreaseDecreaseInLoansHeldForSale_23ae7221-2914-4656-a07e-3c46169ecf3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0bc4c394-f797-4940-be46-4580506c2422" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_38252b04-3ce7-4bd2-8d34-e0cdb91f4019" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0bc4c394-f797-4940-be46-4580506c2422" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_38252b04-3ce7-4bd2-8d34-e0cdb91f4019" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a637afee-c434-4070-8e81-2ac19033dc42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0bc4c394-f797-4940-be46-4580506c2422" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_a637afee-c434-4070-8e81-2ac19033dc42" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_68757fbb-77fc-4867-9345-ec026514f413" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0bc4c394-f797-4940-be46-4580506c2422" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_68757fbb-77fc-4867-9345-ec026514f413" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/AcquisitionsAcquisitiondatefairvalueofpurchasedassetsandassumedliabilitiesandsupplementaryinformationDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#AcquisitionsAcquisitiondatefairvalueofpurchasedassetsandassumedliabilitiesandsupplementaryinformationDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/AcquisitionsAcquisitiondatefairvalueofpurchasedassetsandassumedliabilitiesandsupplementaryinformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits_718013cd-a34a-464a-8917-776e306bf432" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits_718013cd-a34a-464a-8917-776e306bf432" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_5435947e-1041-40ac-a873-3d92f1c744a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_5435947e-1041-40ac-a873-3d92f1c744a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings_6ce39f4f-d567-428b-9056-d033f580781a" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings_6ce39f4f-d567-428b-9056-d033f580781a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_03a06acd-c4bb-4010-9999-e75eb6c7f354" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_03a06acd-c4bb-4010-9999-e75eb6c7f354" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances_bc4cac6f-38e2-4983-8a3a-2379e60877d4" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_9b447d22-39c6-4087-aa14-210bed0357d6" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances_bc4cac6f-38e2-4983-8a3a-2379e60877d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ad0d6394-e7f5-4ab5-b403-3453dea1b817" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationConsiderationTransferredConvertedStockOptions_a6158073-065a-48ee-9aaa-89909b58bc29" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationConsiderationTransferredConvertedStockOptions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ad0d6394-e7f5-4ab5-b403-3453dea1b817" xlink:to="loc_ucbi_BusinessCombinationConsiderationTransferredConvertedStockOptions_a6158073-065a-48ee-9aaa-89909b58bc29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_d930aea8-e132-4929-a00a-64f27356e318" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ad0d6394-e7f5-4ab5-b403-3453dea1b817" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_d930aea8-e132-4929-a00a-64f27356e318" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_c3414995-ddf9-41ed-abff-3d8a9edb8be7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ad0d6394-e7f5-4ab5-b403-3453dea1b817" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_c3414995-ddf9-41ed-abff-3d8a9edb8be7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_87d961b5-9770-48db-95df-31fb07ad6826" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920433ce-1e74-4adb-85d9-64937d0f311d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_87d961b5-9770-48db-95df-31fb07ad6826" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920433ce-1e74-4adb-85d9-64937d0f311d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_ddb3b3f4-0252-460d-b2b6-360bda895d68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_87d961b5-9770-48db-95df-31fb07ad6826" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_ddb3b3f4-0252-460d-b2b6-360bda895d68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsAccruedInterestReceivables_65070a5e-8b7b-4520-a5ae-dd7cfb843157" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsAccruedInterestReceivables"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsAccruedInterestReceivables_65070a5e-8b7b-4520-a5ae-dd7cfb843157" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_00dbf868-042a-4a1e-8d62-25978e46e022" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_00dbf868-042a-4a1e-8d62-25978e46e022" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_9fdc33dd-7aac-42f3-bf05-fb00100a740c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_9fdc33dd-7aac-42f3-bf05-fb00100a740c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_ed4341ed-ed71-41f2-a344-516de27adb25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_ed4341ed-ed71-41f2-a344-516de27adb25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_ca060530-5a28-4dd0-846c-d5bea7cce25c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_ca060530-5a28-4dd0-846c-d5bea7cce25c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance_8630b627-9307-43ab-97d7-edc6c8cf9351" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance_8630b627-9307-43ab-97d7-edc6c8cf9351" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_1ac288aa-4d80-4d68-931f-7e86966406ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_1ac288aa-4d80-4d68-931f-7e86966406ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_80f256a6-a688-49b9-8077-c24c4519cd10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_80f256a6-a688-49b9-8077-c24c4519cd10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_f4918e0e-06e3-41e0-94e0-79f6a6bcf8ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_f4918e0e-06e3-41e0-94e0-79f6a6bcf8ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale_dc1c04e1-2ffc-43f9-bd32-8a445def1281" xlink:href="ucbi-20231231.xsd#ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b9b635d4-a67c-4e03-aca8-a71cfe34bc48" xlink:to="loc_ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale_dc1c04e1-2ffc-43f9-bd32-8a445def1281" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice_2e855ff4-dc81-421d-813c-e67c4850f7e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium_663b8965-715b-453d-9eda-952d25a8e2cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice_2e855ff4-dc81-421d-813c-e67c4850f7e8" xlink:to="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium_663b8965-715b-453d-9eda-952d25a8e2cd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue_4a85a958-93fc-475a-8e4d-f5bbfbf2b5df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice_2e855ff4-dc81-421d-813c-e67c4850f7e8" xlink:to="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue_4a85a958-93fc-475a-8e4d-f5bbfbf2b5df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate_f776c940-99b8-4273-bfe5-10f678b8b283" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice_2e855ff4-dc81-421d-813c-e67c4850f7e8" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate_f776c940-99b8-4273-bfe5-10f678b8b283" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofdebtsecuritiesHTMDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofdebtsecuritiesHTMDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofdebtsecuritiesHTMDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_45f21725-b6b0-4fb6-9892-203f69ff5b33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_4e9aab9f-d34a-4d43-9883-9f148a8410b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_45f21725-b6b0-4fb6-9892-203f69ff5b33" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_4e9aab9f-d34a-4d43-9883-9f148a8410b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_2f0d0719-0dcb-4c67-8072-e3f9dcd873ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_45f21725-b6b0-4fb6-9892-203f69ff5b33" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_2f0d0719-0dcb-4c67-8072-e3f9dcd873ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_a17ea8a9-dd44-4a74-a4b6-236e0048314b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_45f21725-b6b0-4fb6-9892-203f69ff5b33" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesFairValue_a17ea8a9-dd44-4a74-a4b6-236e0048314b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofAFSdebtsecuritiesDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofAFSdebtsecuritiesDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsCostbasisunrealizedgainsandlossesandfairvalueofAFSdebtsecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_5a5c9ce9-3285-482e-9bf0-32f763f5e900" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_3bcc2fc5-a526-4e46-a70c-1ad51cfd0fba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_5a5c9ce9-3285-482e-9bf0-32f763f5e900" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_3bcc2fc5-a526-4e46-a70c-1ad51cfd0fba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0a598039-96c3-4024-8f2a-d764bbf60a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_5a5c9ce9-3285-482e-9bf0-32f763f5e900" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0a598039-96c3-4024-8f2a-d764bbf60a7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_03793ba7-2a27-496d-b141-f93934838afc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_5a5c9ce9-3285-482e-9bf0-32f763f5e900" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_03793ba7-2a27-496d-b141-f93934838afc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsHTMdebtsecuritiesinunrealizedlosspositionDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsHTMdebtsecuritiesinunrealizedlosspositionDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsHTMdebtsecuritiesinunrealizedlosspositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_12822ce0-02f3-434a-a543-492cf8a39da1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_7f100c9c-c532-4914-bf56-9e0d5182dd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_12822ce0-02f3-434a-a543-492cf8a39da1" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_7f100c9c-c532-4914-bf56-9e0d5182dd2b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_f4de9227-454b-4567-8aed-670391741241" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_12822ce0-02f3-434a-a543-492cf8a39da1" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_f4de9227-454b-4567-8aed-670391741241" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_e06a4927-9586-48a8-bc76-303c564aa80b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_31f80313-d63a-4149-b3cc-4efe688914ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_e06a4927-9586-48a8-bc76-303c564aa80b" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_31f80313-d63a-4149-b3cc-4efe688914ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_fcd71a0f-4f31-488b-bcc6-38dc7a400957" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_e06a4927-9586-48a8-bc76-303c564aa80b" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_fcd71a0f-4f31-488b-bcc6-38dc7a400957" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsAFSdebtsecuritiesinunrealizedlosspositionDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsAFSdebtsecuritiesinunrealizedlosspositionDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsAFSdebtsecuritiesinunrealizedlosspositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_d597f6e0-5a0f-4f93-a00c-d50296474632" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_12244657-87f2-4f7a-9ee4-eed347d43956" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_d597f6e0-5a0f-4f93-a00c-d50296474632" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_12244657-87f2-4f7a-9ee4-eed347d43956" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_52c98e4f-b45d-45ca-ae1d-9af36d82c317" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_d597f6e0-5a0f-4f93-a00c-d50296474632" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_52c98e4f-b45d-45ca-ae1d-9af36d82c317" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_51f88e52-3623-4255-bc26-feb4439b5aa0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_50a29cd7-80e7-4298-81f8-fe3576fed09c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_51f88e52-3623-4255-bc26-feb4439b5aa0" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_50a29cd7-80e7-4298-81f8-fe3576fed09c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_fe4d2cff-9fc2-4576-9b1e-92e170c8fd98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_51f88e52-3623-4255-bc26-feb4439b5aa0" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_fe4d2cff-9fc2-4576-9b1e-92e170c8fd98" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsSecuritiessalesactivityDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsSecuritiessalesactivityDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsSecuritiessalesactivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_e1b8fa88-b7f0-4c49-8de8-34bebc02540b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_5ebbee56-dc19-44d7-a9fa-5efd1b6e73ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_e1b8fa88-b7f0-4c49-8de8-34bebc02540b" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_5ebbee56-dc19-44d7-a9fa-5efd1b6e73ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_b9ea5741-ad8d-4296-a756-af49d51e2f94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_e1b8fa88-b7f0-4c49-8de8-34bebc02540b" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_b9ea5741-ad8d-4296-a756-af49d51e2f94" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/InvestmentsAmortizedcostandfairvalueofAFSandHTMdebtsecuritiesbycontractualmaturityDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#InvestmentsAmortizedcostandfairvalueofAFSandHTMdebtsecuritiesbycontractualmaturityDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/InvestmentsAmortizedcostandfairvalueofAFSandHTMdebtsecuritiesbycontractualmaturityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_de64ba5f-54cb-49e6-aae9-e3264fde4e63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_de64ba5f-54cb-49e6-aae9-e3264fde4e63" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_c30b2269-0eaa-431d-8cc0-b2d678a228af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_c30b2269-0eaa-431d-8cc0-b2d678a228af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_7bf7632f-8f07-4d7c-860b-489b1a194417" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_7bf7632f-8f07-4d7c-860b-489b1a194417" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_7f438a6f-df19-4036-8cb1-315471306414" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_7f438a6f-df19-4036-8cb1-315471306414" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_5c1066b2-37b7-4fc7-b3f0-59e2de68f5c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_6f5cfdd4-ff14-43aa-948e-8e897ea01cc0" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_5c1066b2-37b7-4fc7-b3f0-59e2de68f5c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_0a150943-05d9-4d59-a352-fbc7638a6b39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_0a150943-05d9-4d59-a352-fbc7638a6b39" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_3029fa8c-b58d-4c6c-86a5-c22088f98f1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_3029fa8c-b58d-4c6c-86a5-c22088f98f1a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_56d8502d-781c-49dd-b78b-67a7311e7036" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_56d8502d-781c-49dd-b78b-67a7311e7036" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_f3308b39-e158-423d-b48c-ac6001c89650" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_f3308b39-e158-423d-b48c-ac6001c89650" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_1aa0a9e1-7629-481f-807d-b9dd357286a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_95d23df2-b30a-40de-b54e-814216e4a887" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_1aa0a9e1-7629-481f-807d-b9dd357286a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityWithoutSingleMaturityDate_b438dbfa-b992-447c-abf8-20b2b56a9b97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityWithoutSingleMaturityDate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityWithoutSingleMaturityDate_b438dbfa-b992-447c-abf8-20b2b56a9b97" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive_c1a9dbb4-ca57-4668-9711-86e5e25f225c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive_c1a9dbb4-ca57-4668-9711-86e5e25f225c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne_d5e60735-4fa6-4629-a0be-0c1f19a2bd1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne_d5e60735-4fa6-4629-a0be-0c1f19a2bd1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10_585facba-841a-487c-8c85-d3d84dc38b8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10_585facba-841a-487c-8c85-d3d84dc38b8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10_348ad22d-6413-48c8-8ae1-1d35dd5d1dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_5c91ceb7-2a0c-441a-a725-7bbc1d400897" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10_348ad22d-6413-48c8-8ae1-1d35dd5d1dbf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_5ab10917-ee36-4e79-bc0d-07cc05de1450" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_5ab10917-ee36-4e79-bc0d-07cc05de1450" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_0aced767-874c-4d6e-846d-74d79eec0f3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_0aced767-874c-4d6e-846d-74d79eec0f3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_0a40319a-0cd5-4374-b1c0-3fd925cbe266" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_0a40319a-0cd5-4374-b1c0-3fd925cbe266" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_a242036b-869f-497d-a726-b376f873a58e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_a242036b-869f-497d-a726-b376f873a58e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_805ae1d1-1dde-4135-b5ac-60a547191a63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_b1537fba-29d7-4202-ae73-c819cb379261" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_805ae1d1-1dde-4135-b5ac-60a547191a63" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesMajorclassificationsofloanandleaseportfolioDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LoansandLeasesandAllowanceforCreditLossesMajorclassificationsofloanandleaseportfolioDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesMajorclassificationsofloanandleaseportfolioDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_97fd1a96-5014-4c54-b46d-9501f86c92f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost_7258eef7-f690-41f5-a419-3ca859693111" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_97fd1a96-5014-4c54-b46d-9501f86c92f9" xlink:to="loc_us-gaap_HedgedAssetFairValueHedgePortfolioLayerMethodCumulativeIncreaseDecreaseExcludedFromAmortizedCost_7258eef7-f690-41f5-a419-3ca859693111" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_049d9b54-8753-46c7-8207-5ca517468555" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_97fd1a96-5014-4c54-b46d-9501f86c92f9" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_049d9b54-8753-46c7-8207-5ca517468555" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesComponentsofnetinvestmentinleasesDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LoansandLeasesandAllowanceforCreditLossesComponentsofnetinvestmentinleasesDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesComponentsofnetinvestmentinleasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentInLease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable_54aaac86-7c51-4873-ac53-6559d9255a3c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivable_54aaac86-7c51-4873-ac53-6559d9255a3c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_SalesTypeAndDirectFinancingLeasesUnguaranteedResidualAsset_ef706140-1b17-4303-a660-f83a9a00863e" xlink:href="ucbi-20231231.xsd#ucbi_SalesTypeAndDirectFinancingLeasesUnguaranteedResidualAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:to="loc_ucbi_SalesTypeAndDirectFinancingLeasesUnguaranteedResidualAsset_ef706140-1b17-4303-a660-f83a9a00863e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_SalesTypeAndDirectFinancingLeasesInitialDirectCosts_d84553ac-f8c6-4004-91f7-1586e630338c" xlink:href="ucbi-20231231.xsd#ucbi_SalesTypeAndDirectFinancingLeasesInitialDirectCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:to="loc_ucbi_SalesTypeAndDirectFinancingLeasesInitialDirectCosts_d84553ac-f8c6-4004-91f7-1586e630338c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_SalesTypeAndDirectFinancingLeasesSecurityDeposits_2119c4ac-a1f4-475e-b327-b19b5277a4fc" xlink:href="ucbi-20231231.xsd#ucbi_SalesTypeAndDirectFinancingLeasesSecurityDeposits"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:to="loc_ucbi_SalesTypeAndDirectFinancingLeasesSecurityDeposits_2119c4ac-a1f4-475e-b327-b19b5277a4fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_SalesTypeAndDirectFinancingLeasesDeferredSellingProfit_71e6596b-397f-4e5f-9ff4-f2c629c5012a" xlink:href="ucbi-20231231.xsd#ucbi_SalesTypeAndDirectFinancingLeasesDeferredSellingProfit"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentInLease_4bc28ee2-7aa5-4348-b674-40ae20b7471c" xlink:to="loc_ucbi_SalesTypeAndDirectFinancingLeasesDeferredSellingProfit_71e6596b-397f-4e5f-9ff4-f2c629c5012a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesMinimumfutureleasepaymentsexpectedtobereceivedfromequipmentfinancingleasecontractsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LoansandLeasesandAllowanceforCreditLossesMinimumfutureleasepaymentsexpectedtobereceivedfromequipmentfinancingleasecontractsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesMinimumfutureleasepaymentsexpectedtobereceivedfromequipmentfinancingleasecontractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths_50c24845-8b9a-4c29-a3fd-317057f2cac5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths_50c24845-8b9a-4c29-a3fd-317057f2cac5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears_56e8f0d3-8bd6-4479-b611-eac8ddc2dd22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears_56e8f0d3-8bd6-4479-b611-eac8ddc2dd22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears_6eeca096-55d4-422d-b401-1dd70646aa1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears_6eeca096-55d4-422d-b401-1dd70646aa1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears_580c3c72-a376-4d7b-82b2-541f6afbfd46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears_580c3c72-a376-4d7b-82b2-541f6afbfd46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears_a67f4a3e-1905-4dd3-ab9c-f7f8b6b5fa9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears_a67f4a3e-1905-4dd3-ab9c-f7f8b6b5fa9d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter_1e51ece7-5527-4227-9594-3f74a2bd9f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived_7bb9ac98-98c9-44da-9a36-e0dc0ee90b61" xlink:to="loc_us-gaap_SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThereafter_1e51ece7-5527-4227-9594-3f74a2bd9f5b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesRiskcategoryoftermloansbyvintageyearDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LoansandLeasesandAllowanceforCreditLossesRiskcategoryoftermloansbyvintageyearDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesRiskcategoryoftermloansbyvintageyearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_d5517c79-26f7-4f28-8eb7-f3d233bc63ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_d5517c79-26f7-4f28-8eb7-f3d233bc63ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_4fb49622-88ab-4078-8673-52f322e04603" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_4fb49622-88ab-4078-8673-52f322e04603" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff_391fc3f8-e184-4335-b9e9-9badd102e6da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff_391fc3f8-e184-4335-b9e9-9badd102e6da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_7f66f5de-3201-4ba5-a57e-89608e8f5ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_7f66f5de-3201-4ba5-a57e-89608e8f5ed4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff_0e2ac566-51c9-4be4-b002-26aff7cc4eca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff_0e2ac566-51c9-4be4-b002-26aff7cc4eca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_904c91d6-7adf-435a-b771-225d9197bf98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_904c91d6-7adf-435a-b771-225d9197bf98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_7d440650-b60c-44b6-a421-3d48bc91d515" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_7d440650-b60c-44b6-a421-3d48bc91d515" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_b4b748b7-a630-4003-981a-bdf7be5297a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_4d1f9a09-41a8-4b92-b28c-33471e4f7199" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_b4b748b7-a630-4003-981a-bdf7be5297a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_67008431-0684-48d0-9387-5426ecba1b97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_67008431-0684-48d0-9387-5426ecba1b97" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_1b9ac6e6-aa5f-4479-99ec-55eb589b458c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_1b9ac6e6-aa5f-4479-99ec-55eb589b458c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_4df01d4a-7dba-412e-8e48-b389db8731dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_4df01d4a-7dba-412e-8e48-b389db8731dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_e9ef2842-a8f3-4348-9fff-68e8c7e03433" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_e9ef2842-a8f3-4348-9fff-68e8c7e03433" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_a36899ba-78e1-4079-b8a1-13141efacb42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_a36899ba-78e1-4079-b8a1-13141efacb42" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_1c5181e0-6932-4c98-bc63-4a59abc09209" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_1c5181e0-6932-4c98-bc63-4a59abc09209" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolving_27a154f0-8da3-4375-bfa7-4ac436d0ec93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolving"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolving_27a154f0-8da3-4375-bfa7-4ac436d0ec93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan_9f00397a-3adc-4f56-8284-9110144446d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_dbdda3ab-3fb6-4bd8-892a-ecfec102c7a2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan_9f00397a-3adc-4f56-8284-9110144446d2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesBalanceandactivityintheACLbyportfoliosegmentDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LoansandLeasesandAllowanceforCreditLossesBalanceandactivityintheACLbyportfoliosegmentDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LoansandLeasesandAllowanceforCreditLossesBalanceandactivityintheACLbyportfoliosegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_e6b1b4ac-a87e-42a7-9e11-a384370babe3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_57bb2207-23b5-4919-99e9-7c5bcc0b4835" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_e6b1b4ac-a87e-42a7-9e11-a384370babe3" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_57bb2207-23b5-4919-99e9-7c5bcc0b4835" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal_b7337713-158d-4fc3-8d71-0f622368e034" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_e6b1b4ac-a87e-42a7-9e11-a384370babe3" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal_b7337713-158d-4fc3-8d71-0f622368e034" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability_b7d6610d-3f00-4bde-95ea-42effb87c015" xlink:href="ucbi-20231231.xsd#ucbi_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_0029fff8-6216-421d-acbf-3f33c925f517" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability_b7d6610d-3f00-4bde-95ea-42effb87c015" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_0029fff8-6216-421d-acbf-3f33c925f517" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiability_d08124b0-3b45-4bd2-b88a-263814b55a52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OffBalanceSheetCreditLossLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability_b7d6610d-3f00-4bde-95ea-42effb87c015" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiability_d08124b0-3b45-4bd2-b88a-263814b55a52" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/PremisesandEquipmentSummaryDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#PremisesandEquipmentSummaryDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/PremisesandEquipmentSummaryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f369508b-1bdc-49f7-979b-ed256d7e84d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_01679a93-b618-489a-b24b-2030ac1accb9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f369508b-1bdc-49f7-979b-ed256d7e84d2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_01679a93-b618-489a-b24b-2030ac1accb9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_a22ff8bd-a2b5-445c-9994-849e53ea0d55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f369508b-1bdc-49f7-979b-ed256d7e84d2" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_a22ff8bd-a2b5-445c-9994-849e53ea0d55" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/DerivativesandHedgingActivitiesFairvalueofderivativefinancialinstrumentsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#DerivativesandHedgingActivitiesFairvalueofderivativefinancialinstrumentsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/DerivativesandHedgingActivitiesFairvalueofderivativefinancialinstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_19784bbe-52b4-4ff3-8ed3-824d8039ac63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_743c8bb8-f768-49c7-afe0-ab8fe83bfedf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_19784bbe-52b4-4ff3-8ed3-824d8039ac63" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_743c8bb8-f768-49c7-afe0-ab8fe83bfedf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_ba3cda6f-56f6-4896-9d8c-25208034e80d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_19784bbe-52b4-4ff3-8ed3-824d8039ac63" xlink:to="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_ba3cda6f-56f6-4896-9d8c-25208034e80d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueOfCollateral_c0e82f75-8742-47be-aea6-235ec02bdf0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilityFairValueOfCollateral"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_19784bbe-52b4-4ff3-8ed3-824d8039ac63" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueOfCollateral_c0e82f75-8742-47be-aea6-235ec02bdf0c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_847857f5-f72d-460e-9e21-5403f160dcc4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_610b789d-36c5-44ea-902c-e085fe26fab3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_847857f5-f72d-460e-9e21-5403f160dcc4" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_610b789d-36c5-44ea-902c-e085fe26fab3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_b34440e8-e8d8-412e-b83d-8fd2a1e5ee73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_847857f5-f72d-460e-9e21-5403f160dcc4" xlink:to="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_b34440e8-e8d8-412e-b83d-8fd2a1e5ee73" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueOfCollateral_50f58bc4-43fa-46c3-958f-955901710fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetFairValueOfCollateral"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection_847857f5-f72d-460e-9e21-5403f160dcc4" xlink:to="loc_us-gaap_DerivativeAssetFairValueOfCollateral_50f58bc4-43fa-46c3-958f-955901710fc7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/GoodwillandOtherIntangibleAssetsCarryingamountDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#GoodwillandOtherIntangibleAssetsCarryingamountDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/GoodwillandOtherIntangibleAssetsCarryingamountDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_62643e6f-fd12-4be1-b4aa-d037a2dcdb93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3e044b1-81c5-4303-ae62-604b6bb73281" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_62643e6f-fd12-4be1-b4aa-d037a2dcdb93" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3e044b1-81c5-4303-ae62-604b6bb73281" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_82eaee32-2889-4531-a225-347fd4feba8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_62643e6f-fd12-4be1-b4aa-d037a2dcdb93" xlink:to="loc_us-gaap_Goodwill_82eaee32-2889-4531-a225-347fd4feba8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5421c4f6-71d9-406d-bb1f-36502022dad3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8909e7e5-22e4-4742-a015-6702841700fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5421c4f6-71d9-406d-bb1f-36502022dad3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8909e7e5-22e4-4742-a015-6702841700fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1fe62e64-9f6b-4e76-a9c8-41e18b64068b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5421c4f6-71d9-406d-bb1f-36502022dad3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1fe62e64-9f6b-4e76-a9c8-41e18b64068b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/GoodwillandOtherIntangibleAssetsEstimatedaggregateamortizationexpenseforfutureperiodsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#GoodwillandOtherIntangibleAssetsEstimatedaggregateamortizationexpenseforfutureperiodsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/GoodwillandOtherIntangibleAssetsEstimatedaggregateamortizationexpenseforfutureperiodsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4279a7a6-797d-4be5-842e-eeeb1ad1e610" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4279a7a6-797d-4be5-842e-eeeb1ad1e610" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_4c9b9e8b-c27e-4f63-b5fd-953d5e514f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_4c9b9e8b-c27e-4f63-b5fd-953d5e514f2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_398a39f4-1381-46f3-af8c-920009ed8a6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_398a39f4-1381-46f3-af8c-920009ed8a6c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_1329041f-b7ce-4843-bb8e-e7c58b28acbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_1329041f-b7ce-4843-bb8e-e7c58b28acbe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_beee6497-d316-4345-abcf-6c63e888132b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_beee6497-d316-4345-abcf-6c63e888132b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_e7a83f11-9ade-49cc-aff2-0efe4bba8a5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f33dd0bc-3b1a-4a50-a660-525a319529e5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_e7a83f11-9ade-49cc-aff2-0efe4bba8a5e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/TimeDepositsContractualmaturitiesoftimedepositsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#TimeDepositsContractualmaturitiesoftimedepositsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/TimeDepositsContractualmaturitiesoftimedepositsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDeposits"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearOne_97ee67a0-f1fe-4047-a2b2-db46255ae820" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesYearOne"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearOne_97ee67a0-f1fe-4047-a2b2-db46255ae820" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearTwo_7b794eb2-3ca6-4654-af59-6e1ec640c652" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearTwo_7b794eb2-3ca6-4654-af59-6e1ec640c652" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearThree_cd3b53a9-09c5-492f-9a83-6f197e6889dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearThree_cd3b53a9-09c5-492f-9a83-6f197e6889dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFour_3d9ffa8f-7dd7-470c-a313-7ba608807318" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearFour_3d9ffa8f-7dd7-470c-a313-7ba608807318" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFive_a768bb32-c0bb-4c23-86ba-97e5373d50a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearFive_a768bb32-c0bb-4c23-86ba-97e5373d50a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_0c534c90-5c74-4b83-b605-f80533eba83c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimeDepositMaturitiesAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_54cfa214-f577-4be7-bfec-468643e6142e" xlink:to="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_0c534c90-5c74-4b83-b605-f80533eba83c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/LongtermDebtScheduleoflongtermdebtDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#LongtermDebtScheduleoflongtermdebtDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/LongtermDebtScheduleoflongtermdebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_05061da7-f2ee-448e-bd9f-14ecd7c28766" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_3f44821a-bab1-409a-8abb-52c131245d33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_05061da7-f2ee-448e-bd9f-14ecd7c28766" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_3f44821a-bab1-409a-8abb-52c131245d33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_c2d4e461-d5ec-4147-8c65-0d515574a804" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_05061da7-f2ee-448e-bd9f-14ecd7c28766" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_c2d4e461-d5ec-4147-8c65-0d515574a804" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/OperatingLeasesOperatingleaseincomeandexpenseandothersupplementalinformationDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#OperatingLeasesOperatingleaseincomeandexpenseandothersupplementalinformationDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/OperatingLeasesOperatingleaseincomeandexpenseandothersupplementalinformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_5f1bfe7f-5cf2-471d-bebc-dac207189ce7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_0ec1990d-e388-4acf-83fc-c5e2a450b5f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_5f1bfe7f-5cf2-471d-bebc-dac207189ce7" xlink:to="loc_us-gaap_OperatingLeaseCost_0ec1990d-e388-4acf-83fc-c5e2a450b5f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_a5c46511-49b9-433c-9003-f207e435cbff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_5f1bfe7f-5cf2-471d-bebc-dac207189ce7" xlink:to="loc_us-gaap_VariableLeaseCost_a5c46511-49b9-433c-9003-f207e435cbff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_2f0b5a50-f66a-4478-afc7-c3ae5c685bd3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_5f1bfe7f-5cf2-471d-bebc-dac207189ce7" xlink:to="loc_us-gaap_ShortTermLeaseCost_2f0b5a50-f66a-4478-afc7-c3ae5c685bd3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/OperatingLeasesFutureminimumleasepaymentsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#OperatingLeasesFutureminimumleasepaymentsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/OperatingLeasesFutureminimumleasepaymentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_e6f40005-d0e7-47d9-985f-44305177f21e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_67f2c8e4-2d26-473b-b24f-f218afb2f072" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_e6f40005-d0e7-47d9-985f-44305177f21e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_67f2c8e4-2d26-473b-b24f-f218afb2f072" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_55c4a978-88fe-44e0-91c6-dee4e74069ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_e6f40005-d0e7-47d9-985f-44305177f21e" xlink:to="loc_us-gaap_OperatingLeaseLiability_55c4a978-88fe-44e0-91c6-dee4e74069ed" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/OperatingLeasesFutureminimumleasepaymentsDetails_1" xlink:type="simple" xlink:href="ucbi-20231231.xsd#OperatingLeasesFutureminimumleasepaymentsDetails_1"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/OperatingLeasesFutureminimumleasepaymentsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_5e53f82f-9584-42cd-a93d-87aef0ed6d97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_5e53f82f-9584-42cd-a93d-87aef0ed6d97" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6c6394f2-2281-4e85-9843-7ae376839c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6c6394f2-2281-4e85-9843-7ae376839c9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_5f288ac2-cd3d-4098-9444-4ddfc568df7a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_5f288ac2-cd3d-4098-9444-4ddfc568df7a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_ca71d638-ad09-40c9-bf11-b4e93e57b2e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_ca71d638-ad09-40c9-bf11-b4e93e57b2e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_ec59cbd3-5755-4171-b686-946cee84f3ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_ec59cbd3-5755-4171-b686-946cee84f3ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_83528120-0220-4f69-8b5b-16e6cfa310cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_9d45ab2a-65b5-407b-bdf6-caf39402f360" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_83528120-0220-4f69-8b5b-16e6cfa310cc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/FairValueMeasurementsAssetsandliabilitiesmeasuredatfairvalueonrecurringbasisDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#FairValueMeasurementsAssetsandliabilitiesmeasuredatfairvalueonrecurringbasisDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/FairValueMeasurementsAssetsandliabilitiesmeasuredatfairvalueonrecurringbasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_3d98d5ea-47d3-456b-b5e8-828dd5bbb37b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_e47fc93a-36e5-40e1-9548-02cfb91d7815" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_3d98d5ea-47d3-456b-b5e8-828dd5bbb37b" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_e47fc93a-36e5-40e1-9548-02cfb91d7815" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_614acfad-9dc7-4a48-8704-0f6dc5ff7ded" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_3d98d5ea-47d3-456b-b5e8-828dd5bbb37b" xlink:to="loc_us-gaap_DerivativeLiabilities_614acfad-9dc7-4a48-8704-0f6dc5ff7ded" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_35d56f34-f7c1-4136-9357-5d0e89327be8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_35d56f34-f7c1-4136-9357-5d0e89327be8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_894ee4ad-01d4-45be-8670-0ced401c09c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_894ee4ad-01d4-45be-8670-0ced401c09c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_98331dab-fd7d-423e-85b7-ee05d138c056" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MortgagesHeldForSaleFairValueDisclosure"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_98331dab-fd7d-423e-85b7-ee05d138c056" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_1f1b7176-4dd5-45a1-89e2-7e19ad0a8507" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_1f1b7176-4dd5-45a1-89e2-7e19ad0a8507" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_9539fedc-0ac3-4916-b3dd-49738d0236df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_ServicingAssetAtFairValueAmount_9539fedc-0ac3-4916-b3dd-49738d0236df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_ResidentialMortgageServicingAssetAtFairValueAmount_23c58694-e8ca-4fb2-a173-ff6793ebacbc" xlink:href="ucbi-20231231.xsd#ucbi_ResidentialMortgageServicingAssetAtFairValueAmount"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_ucbi_ResidentialMortgageServicingAssetAtFairValueAmount_23c58694-e8ca-4fb2-a173-ff6793ebacbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_ed040b2e-fe21-4758-bb72-69e9fcfc09bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssets"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_e45d84e2-3e14-4dbd-8b77-e3d9ef214a51" xlink:to="loc_us-gaap_DerivativeAssets_ed040b2e-fe21-4758-bb72-69e9fcfc09bb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/EarningsPerShareComputationofbasicanddilutedearningspershareDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#EarningsPerShareComputationofbasicanddilutedearningspershareDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/EarningsPerShareComputationofbasicanddilutedearningspershareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8cd0dc33-9797-45a8-a98d-4eecaad8dc79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_374dea81-d230-4aae-b72c-72348c9c2580" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8cd0dc33-9797-45a8-a98d-4eecaad8dc79" xlink:to="loc_us-gaap_NetIncomeLoss_374dea81-d230-4aae-b72c-72348c9c2580" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_1bf4de30-477c-41f1-b3a1-2c185d617ebd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8cd0dc33-9797-45a8-a98d-4eecaad8dc79" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_1bf4de30-477c-41f1-b3a1-2c185d617ebd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_51d39411-df9a-476e-b7e0-b075698c7168" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8cd0dc33-9797-45a8-a98d-4eecaad8dc79" xlink:to="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_51d39411-df9a-476e-b7e0-b075698c7168" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DiscountOnPreferredSharesRepurchased_ceb903a0-0652-433b-8cdb-a7ec1efd47a7" xlink:href="ucbi-20231231.xsd#ucbi_DiscountOnPreferredSharesRepurchased"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8cd0dc33-9797-45a8-a98d-4eecaad8dc79" xlink:to="loc_ucbi_DiscountOnPreferredSharesRepurchased_ceb903a0-0652-433b-8cdb-a7ec1efd47a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a05585b3-3e11-46ee-8e85-8d2e706e9e90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_76072a1a-4033-493d-acd7-025d1954f8d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a05585b3-3e11-46ee-8e85-8d2e706e9e90" xlink:to="loc_us-gaap_NetIncomeLoss_76072a1a-4033-493d-acd7-025d1954f8d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_bdd1f463-263c-4221-9bd6-c97fd8e57ae7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a05585b3-3e11-46ee-8e85-8d2e706e9e90" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_bdd1f463-263c-4221-9bd6-c97fd8e57ae7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_5f30063b-73fb-4408-9b0f-b84afce21dc1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a05585b3-3e11-46ee-8e85-8d2e706e9e90" xlink:to="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_5f30063b-73fb-4408-9b0f-b84afce21dc1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DiscountOnPreferredSharesRepurchased_6a710fd6-0bad-4421-ad6f-0441be1d1da4" xlink:href="ucbi-20231231.xsd#ucbi_DiscountOnPreferredSharesRepurchased"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a05585b3-3e11-46ee-8e85-8d2e706e9e90" xlink:to="loc_ucbi_DiscountOnPreferredSharesRepurchased_6a710fd6-0bad-4421-ad6f-0441be1d1da4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_90294d30-baa9-4237-b916-6e623cadc998" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_36cbe02c-008b-4a99-8552-572c401e57c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_90294d30-baa9-4237-b916-6e623cadc998" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_36cbe02c-008b-4a99-8552-572c401e57c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_4c2aceb5-8088-4214-a25c-553eb84eca4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_90294d30-baa9-4237-b916-6e623cadc998" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_4c2aceb5-8088-4214-a25c-553eb84eca4c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/IncomeTaxesIncometaxexpenseDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#IncomeTaxesIncometaxexpenseDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/IncomeTaxesIncometaxexpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_0f48e5b6-48de-40b6-8a30-d5523b60eea2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_1212fe28-29e4-4565-ac61-646fbd33c0c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_0f48e5b6-48de-40b6-8a30-d5523b60eea2" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_1212fe28-29e4-4565-ac61-646fbd33c0c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredOtherTaxExpenseBenefit_a9d37070-0f50-4b0c-ac71-5dbe414eb126" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredOtherTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_0f48e5b6-48de-40b6-8a30-d5523b60eea2" xlink:to="loc_us-gaap_DeferredOtherTaxExpenseBenefit_a9d37070-0f50-4b0c-ac71-5dbe414eb126" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/IncomeTaxesDifferencesbetweenprovisionforincometaxesandamountcomputedasstatutoryrateDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#IncomeTaxesDifferencesbetweenprovisionforincometaxesandamountcomputedasstatutoryrateDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/IncomeTaxesDifferencesbetweenprovisionforincometaxesandamountcomputedasstatutoryrateDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_cbfa91ac-f0b1-4ffd-a5ce-35c96977f7ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_cbfa91ac-f0b1-4ffd-a5ce-35c96977f7ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_5c1adfef-14c3-4c2e-afca-1126a63c5d59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_5c1adfef-14c3-4c2e-afca-1126a63c5d59" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceEarnings_226df378-ce91-4c27-9fbe-c7287d85372d" xlink:href="ucbi-20231231.xsd#ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceEarnings"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceEarnings_226df378-ce91-4c27-9fbe-c7287d85372d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeTaxReconciliationChangeInReservesForUncertainTaxPositions_bd7cd4c8-4cad-4cf5-921e-7dfe93782463" xlink:href="ucbi-20231231.xsd#ucbi_IncomeTaxReconciliationChangeInReservesForUncertainTaxPositions"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_ucbi_IncomeTaxReconciliationChangeInReservesForUncertainTaxPositions_bd7cd4c8-4cad-4cf5-921e-7dfe93782463" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_8137b974-e291-42a2-b11b-074144d3ecb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationTaxExemptIncome"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_8137b974-e291-42a2-b11b-074144d3ecb6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_d596f285-1759-47ea-bbbd-d93f078975dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_d596f285-1759-47ea-bbbd-d93f078975dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeTaxReconciliationTaxTransactionCosts_8b29c477-7a77-4545-8806-7688124eaf47" xlink:href="ucbi-20231231.xsd#ucbi_IncomeTaxReconciliationTaxTransactionCosts"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_ucbi_IncomeTaxReconciliationTaxTransactionCosts_8b29c477-7a77-4545-8806-7688124eaf47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCredits_a311f21e-22e4-475a-be7f-a0a52936b113" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationTaxCredits"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCredits_a311f21e-22e4-475a-be7f-a0a52936b113" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherReconcilingItems_cc36867d-73bf-42c1-8075-7c32c3d769ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationOtherReconcilingItems"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherReconcilingItems_cc36867d-73bf-42c1-8075-7c32c3d769ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceSurrender_1b0e24f0-f6af-46b3-9cd4-31e202c925e9" xlink:href="ucbi-20231231.xsd#ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceSurrender"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_ucbi_IncomeTaxReconciliationBankOwnedLifeInsuranceSurrender_1b0e24f0-f6af-46b3-9cd4-31e202c925e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeTaxReconciliationFederalDepositInsuranceCorporationPremiumExpense_861a4bc8-eec6-4cc4-abdc-a25e394b7924" xlink:href="ucbi-20231231.xsd#ucbi_IncomeTaxReconciliationFederalDepositInsuranceCorporationPremiumExpense"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_bdaf81bd-f25e-47b4-b4da-240d45764d5a" xlink:to="loc_ucbi_IncomeTaxReconciliationFederalDepositInsuranceCorporationPremiumExpense_861a4bc8-eec6-4cc4-abdc-a25e394b7924" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/IncomeTaxesDeferredtaxesDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#IncomeTaxesDeferredtaxesDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/IncomeTaxesDeferredtaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_e9166f99-3110-415d-9210-3e5e093312eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_bd822c29-0845-4bbc-8031-2f868353632c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_e9166f99-3110-415d-9210-3e5e093312eb" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_bd822c29-0845-4bbc-8031-2f868353632c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_943c051a-b677-4bfd-9e05-1d7e75053b00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_e9166f99-3110-415d-9210-3e5e093312eb" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_943c051a-b677-4bfd-9e05-1d7e75053b00" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_443591e8-cc6b-4c92-9914-ddd194cee26f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_e9166f99-3110-415d-9210-3e5e093312eb" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_443591e8-cc6b-4c92-9914-ddd194cee26f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_04411f6b-e657-498c-8c4f-1627d6c8988b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_04411f6b-e657-498c-8c4f-1627d6c8988b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_29c8b360-d3e6-498b-bdc7-42f47e05798c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_29c8b360-d3e6-498b-bdc7-42f47e05798c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_512be795-8bc7-4088-a127-cb3645aeb845" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_512be795-8bc7-4088-a127-cb3645aeb845" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxAssetsLoanPurchaseAccountingAdjustment_eb14c0c8-094b-49b0-9124-7f1c29b01b10" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxAssetsLoanPurchaseAccountingAdjustment"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_ucbi_DeferredTaxAssetsLoanPurchaseAccountingAdjustment_eb14c0c8-094b-49b0-9124-7f1c29b01b10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_8a346fa9-d7a8-44b2-a253-aeebdb39bc2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_8a346fa9-d7a8-44b2-a253-aeebdb39bc2f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_49328252-a6e6-497a-b676-fa1c2c3eff9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_49328252-a6e6-497a-b676-fa1c2c3eff9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_8cd8e012-c63f-4d6e-89c2-033d93ac41bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_8cd8e012-c63f-4d6e-89c2-033d93ac41bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxAssetsDeferredGainOnSBAUSDALoanSales_90672f67-7872-4328-b369-94420e61ff2b" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxAssetsDeferredGainOnSBAUSDALoanSales"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_ucbi_DeferredTaxAssetsDeferredGainOnSBAUSDALoanSales_90672f67-7872-4328-b369-94420e61ff2b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxAssetsLeaseLiability_bd3f9687-61e0-421c-b567-dcbd343c7127" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxAssetsLeaseLiability"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_ucbi_DeferredTaxAssetsLeaseLiability_bd3f9687-61e0-421c-b567-dcbd343c7127" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_647e753d-b826-4ef0-bf54-916e85e19f68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_647e753d-b826-4ef0-bf54-916e85e19f68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_346ff8ff-7ab8-4253-a85f-39a25aee441b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_346ff8ff-7ab8-4253-a85f-39a25aee441b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInvestments_c0781836-e0c6-4198-ae5e-16940514bee9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsInvestments"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_90b6933a-3842-4a50-902e-314352fe64b0" xlink:to="loc_us-gaap_DeferredTaxAssetsInvestments_c0781836-e0c6-4198-ae5e-16940514bee9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilitiesRightOfUseAssets_e1d80888-cd76-4d2a-a0ee-6aa778208792" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilitiesRightOfUseAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilitiesRightOfUseAssets_e1d80888-cd76-4d2a-a0ee-6aa778208792" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_7d9ba991-88b1-4185-a6ea-e57a31f10f15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_7d9ba991-88b1-4185-a6ea-e57a31f10f15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_b6234f1d-09d6-44ca-afac-c521b4d431f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_b6234f1d-09d6-44ca-afac-c521b4d431f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilitiesSecuritiesPurchaseAccountingAdjustments_2913661c-e562-4ba3-99f2-6697dde3b85a" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilitiesSecuritiesPurchaseAccountingAdjustments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilitiesSecuritiesPurchaseAccountingAdjustments_2913661c-e562-4ba3-99f2-6697dde3b85a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_0311e39d-309f-4f2d-a0fe-5dd453c98777" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_0311e39d-309f-4f2d-a0fe-5dd453c98777" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_f749aa3a-fa92-41af-af96-9593b445fd06" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_f749aa3a-fa92-41af-af96-9593b445fd06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesMortgageServicingRights_cd399c89-3a4b-440a-afc1-8183ee38b6df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesMortgageServicingRights"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesMortgageServicingRights_cd399c89-3a4b-440a-afc1-8183ee38b6df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_0cbe2420-865f-4f1d-8515-f4adf921aaf4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_0cbe2420-865f-4f1d-8515-f4adf921aaf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilitiesUnrealizedGainOnCashFlowHedge_745c9668-e69d-4efa-9acb-1e6f133db956" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilitiesUnrealizedGainOnCashFlowHedge"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilitiesUnrealizedGainOnCashFlowHedge_745c9668-e69d-4efa-9acb-1e6f133db956" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilitiesBankOwnedLifeInsurance_0448dfc1-733b-43be-8e53-a1f90f65efe0" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilitiesBankOwnedLifeInsurance"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilitiesBankOwnedLifeInsurance_0448dfc1-733b-43be-8e53-a1f90f65efe0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDerivatives_32df7d09-9ec3-4864-bf7c-b8133d3891bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesDerivatives"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDerivatives_32df7d09-9ec3-4864-bf7c-b8133d3891bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilityUncertainTaxPositions_12a02816-4cd0-4459-a24a-5e83a744cb9d" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilityUncertainTaxPositions"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilityUncertainTaxPositions_12a02816-4cd0-4459-a24a-5e83a744cb9d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DeferredTaxLiabilitiesPreferredSecuritiesDebtIssuanceCosts_51de9ab6-431e-4c42-ac66-db0316cdfcea" xlink:href="ucbi-20231231.xsd#ucbi_DeferredTaxLiabilitiesPreferredSecuritiesDebtIssuanceCosts"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bf7487cd-44e4-43ca-a2ce-c71a8f746379" xlink:to="loc_ucbi_DeferredTaxLiabilitiesPreferredSecuritiesDebtIssuanceCosts_51de9ab6-431e-4c42-ac66-db0316cdfcea" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/BenefitPlansChangesinobligationsandplanassetsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#BenefitPlansChangesinobligationsandplanassetsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/BenefitPlansChangesinobligationsandplanassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_896f12f9-a1a6-42d8-bcdc-224cde2678a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_5a54fafd-cddf-44ec-b29f-fd89995c0538" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_896f12f9-a1a6-42d8-bcdc-224cde2678a5" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_5a54fafd-cddf-44ec-b29f-fd89995c0538" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0da083ce-c564-4eac-8fc6-6ec916bbdbbb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_896f12f9-a1a6-42d8-bcdc-224cde2678a5" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0da083ce-c564-4eac-8fc6-6ec916bbdbbb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/BenefitPlansComponentsofnetperiodicbenefitcostDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#BenefitPlansComponentsofnetperiodicbenefitcostDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/BenefitPlansComponentsofnetperiodicbenefitcostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_fda5e849-26e7-4dec-a7ae-d04edc8c8c37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_ac053097-7ce8-4df1-b79a-bca807fbdf64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_fda5e849-26e7-4dec-a7ae-d04edc8c8c37" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_ac053097-7ce8-4df1-b79a-bca807fbdf64" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_e9cc4fae-cf94-4cb7-8c93-a6f055293f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_fda5e849-26e7-4dec-a7ae-d04edc8c8c37" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_e9cc4fae-cf94-4cb7-8c93-a6f055293f2c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_65b56961-b86e-47d6-a6fb-a543aa4a94dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_fda5e849-26e7-4dec-a7ae-d04edc8c8c37" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_65b56961-b86e-47d6-a6fb-a543aa4a94dc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_83a174d5-c13d-4489-a335-4cd26f4e8849" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_fda5e849-26e7-4dec-a7ae-d04edc8c8c37" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_83a174d5-c13d-4489-a335-4cd26f4e8849" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyBalanceSheetsDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyBalanceSheetsDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9a5d5d25-96c7-4a7d-a9a7-07f2db356a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9b5d6ea1-c30b-4bdb-b183-3af6af63ff51" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9a5d5d25-96c7-4a7d-a9a7-07f2db356a3a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9b5d6ea1-c30b-4bdb-b183-3af6af63ff51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_InvestmentsInBank_00b4fc8e-b800-4cad-a5a3-a06fc0b025f4" xlink:href="ucbi-20231231.xsd#ucbi_InvestmentsInBank"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9a5d5d25-96c7-4a7d-a9a7-07f2db356a3a" xlink:to="loc_ucbi_InvestmentsInBank_00b4fc8e-b800-4cad-a5a3-a06fc0b025f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_5b0b7a34-d29f-466a-a551-11a55153ef2a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9a5d5d25-96c7-4a7d-a9a7-07f2db356a3a" xlink:to="loc_us-gaap_OtherAssets_5b0b7a34-d29f-466a-a551-11a55153ef2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_f8415138-d087-4803-883b-0b56d42910d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9a5d5d25-96c7-4a7d-a9a7-07f2db356a3a" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_f8415138-d087-4803-883b-0b56d42910d2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ucbi.com/role/CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyStatementsofIncomeDetails" xlink:type="simple" xlink:href="ucbi-20231231.xsd#CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyStatementsofIncomeDetails"/>
  <link:calculationLink xlink:role="http://ucbi.com/role/CondensedFinancialStatementsofUnitedCommunityBanksIncHoldingCompanyOnlyStatementsofIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_7a77152b-dfbe-4290-94d1-4c7c1977d832" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_ee6f3b4b-a87e-4b3f-8c4f-f70981e8f9df" xlink:href="ucbi-20231231.xsd#ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_7a77152b-dfbe-4290-94d1-4c7c1977d832" xlink:to="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_ee6f3b4b-a87e-4b3f-8c4f-f70981e8f9df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_b271a105-f833-45de-9882-682831ce1e62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromSubsidiariesNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_7a77152b-dfbe-4290-94d1-4c7c1977d832" xlink:to="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_b271a105-f833-45de-9882-682831ce1e62" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_9403679e-0bdc-406d-9775-f324016d3df7" xlink:href="ucbi-20231231.xsd#ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_CondensedIncomeStatementIncome_c1054261-395a-4ee9-b258-eb60f89caecb" xlink:href="ucbi-20231231.xsd#ucbi_CondensedIncomeStatementIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_9403679e-0bdc-406d-9775-f324016d3df7" xlink:to="loc_ucbi_CondensedIncomeStatementIncome_c1054261-395a-4ee9-b258-eb60f89caecb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_CondensedIncomeStatementTotalExpense_376b9079-2b64-4f49-88a4-bc06af3b5c2b" xlink:href="ucbi-20231231.xsd#ucbi_CondensedIncomeStatementTotalExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_9403679e-0bdc-406d-9775-f324016d3df7" xlink:to="loc_ucbi_CondensedIncomeStatementTotalExpense_376b9079-2b64-4f49-88a4-bc06af3b5c2b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9ebd585a-06cb-4bb1-abda-ca529b78e7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries_9403679e-0bdc-406d-9775-f324016d3df7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9ebd585a-06cb-4bb1-abda-ca529b78e7ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_CondensedIncomeStatementIncome_404bedfb-16fc-4d96-81ca-75d61b9571ec" xlink:href="ucbi-20231231.xsd#ucbi_CondensedIncomeStatementIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesBank_9a18f1ef-6c5e-42c2-a44e-da70d0d8255f" xlink:href="ucbi-20231231.xsd#ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesBank"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementIncome_404bedfb-16fc-4d96-81ca-75d61b9571ec" xlink:to="loc_ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesBank_9a18f1ef-6c5e-42c2-a44e-da70d0d8255f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesOther_3e126ae1-722a-4316-9443-8bc2e325ddd3" xlink:href="ucbi-20231231.xsd#ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementIncome_404bedfb-16fc-4d96-81ca-75d61b9571ec" xlink:to="loc_ucbi_DividendIncomeReceivedFromConsolidatedSubsidiariesOther_3e126ae1-722a-4316-9443-8bc2e325ddd3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_SharedServiceFeesFromSubsidiaries_e1012208-183f-49e3-a5d3-ff01bba909c5" xlink:href="ucbi-20231231.xsd#ucbi_SharedServiceFeesFromSubsidiaries"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementIncome_404bedfb-16fc-4d96-81ca-75d61b9571ec" xlink:to="loc_ucbi_SharedServiceFeesFromSubsidiaries_e1012208-183f-49e3-a5d3-ff01bba909c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome_53cb585e-1f7b-4ab9-8dc9-768c2dc3709e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherIncome"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementIncome_404bedfb-16fc-4d96-81ca-75d61b9571ec" xlink:to="loc_us-gaap_OtherIncome_53cb585e-1f7b-4ab9-8dc9-768c2dc3709e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ucbi_CondensedIncomeStatementTotalExpense_0c09be7d-0597-4313-a4f8-75e83f8a0900" xlink:href="ucbi-20231231.xsd#ucbi_CondensedIncomeStatementTotalExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_a66ba59e-0ad7-4d8e-9742-299f35c48901" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementTotalExpense_0c09be7d-0597-4313-a4f8-75e83f8a0900" xlink:to="loc_us-gaap_InterestExpense_a66ba59e-0ad7-4d8e-9742-299f35c48901" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_c5778b64-d430-4feb-a8e0-b752f0fc2aea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherExpenses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ucbi_CondensedIncomeStatementTotalExpense_0c09be7d-0597-4313-a4f8-75e83f8a0900" xlink:to="loc_us-gaap_OtherExpenses_c5778b64-d430-4feb-a8e0-b752f0fc2aea" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
