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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:756b01ca-4115-4573-9f4f-b5242a818003,g:b0db7166-5719-47f2-87d4-bc1b32461552-->
<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://www.firstwatch.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="fwrg-20250629.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_700ad0c4-4d9d-4d46-89af-afca07fd2c10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_700ad0c4-4d9d-4d46-89af-afca07fd2c10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_2a837686-a650-4dad-936d-2190b7548091" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_InventoryNet_2a837686-a650-4dad-936d-2190b7548091" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_799eeda5-0224-4c47-a3de-0b619a145575" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_799eeda5-0224-4c47-a3de-0b619a145575" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_9b8e9c55-9b32-4530-b490-87b2d76b4ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_OtherAssetsCurrent_9b8e9c55-9b32-4530-b490-87b2d76b4ef5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_10c1043b-33e1-46b3-9398-18651578abb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_10c1043b-33e1-46b3-9398-18651578abb4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_90260734-068d-4921-8a64-b7971dc927fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_1fbc813e-89c1-41c1-b6bc-144ccc9de117" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_90260734-068d-4921-8a64-b7971dc927fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c755a3e6-95b1-4745-94b5-552488da3056" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c755a3e6-95b1-4745-94b5-552488da3056" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_ae50457a-f98d-451e-94c0-1397d211368c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_ae50457a-f98d-451e-94c0-1397d211368c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_43dbfe36-ad6a-4d6a-b787-6790f17bf03a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_AssetsCurrent_43dbfe36-ad6a-4d6a-b787-6790f17bf03a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_58c14c3b-b366-44bc-b3dd-7edc8ad95457" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_58c14c3b-b366-44bc-b3dd-7edc8ad95457" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_f357d619-5e5b-4a3c-b108-2e982aa15fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_f357d619-5e5b-4a3c-b108-2e982aa15fc5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_77dd9ef7-6b11-494c-8398-f9a2f73bbdf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_11510019-5631-4aba-a6e2-839459de1e79" xlink:to="loc_us-gaap_Goodwill_77dd9ef7-6b11-494c-8398-f9a2f73bbdf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_1b18586a-68ef-4d35-b93f-c402f9a745a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_LiabilitiesCurrent_1b18586a-68ef-4d35-b93f-c402f9a745a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_587dd214-ef3a-4ded-bc0f-bf5b627aa7da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_DerivativeLiabilities_587dd214-ef3a-4ded-bc0f-bf5b627aa7da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_e0b76a39-ce05-4dd7-b807-1da3710028c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_e0b76a39-ce05-4dd7-b807-1da3710028c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_d2d81cd0-55f2-4a78-8e41-9cf0d2d2647a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_d2d81cd0-55f2-4a78-8e41-9cf0d2d2647a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_b1ff7327-6db6-4615-8c2e-01eb82d141c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_b1ff7327-6db6-4615-8c2e-01eb82d141c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_4fc19d02-c602-47b3-ac0c-eca81b798064" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_08764635-3d31-4fc0-9927-ff21ecc5ac30" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_4fc19d02-c602-47b3-ac0c-eca81b798064" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_f7b546c4-6713-45e8-8a92-ff870e9fe162" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ddf4360b-8d54-4181-a916-6b996c18746d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_f7b546c4-6713-45e8-8a92-ff870e9fe162" xlink:to="loc_us-gaap_StockholdersEquity_ddf4360b-8d54-4181-a916-6b996c18746d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_5dfb940b-5fe5-418b-93ee-a6b799fd44f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_f7b546c4-6713-45e8-8a92-ff870e9fe162" xlink:to="loc_us-gaap_CommitmentsAndContingencies_5dfb940b-5fe5-418b-93ee-a6b799fd44f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_e015b0a5-a3ad-4260-9c6a-d9a2b6d85a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_f7b546c4-6713-45e8-8a92-ff870e9fe162" xlink:to="loc_us-gaap_Liabilities_e015b0a5-a3ad-4260-9c6a-d9a2b6d85a8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_93f5b7e2-36c6-427f-a5f1-7d5828e7154d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_AccountsPayableCurrent_93f5b7e2-36c6-427f-a5f1-7d5828e7154d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_22c9b7b9-1a5f-4753-aaf3-afbb3a3cc491" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_22c9b7b9-1a5f-4753-aaf3-afbb3a3cc491" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_PortionOfLongTermDebtCurrent_39ed96b5-267d-4e8e-b9c0-ee6f4358c7be" xlink:href="fwrg-20250629.xsd#fwrg_PortionOfLongTermDebtCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_fwrg_PortionOfLongTermDebtCurrent_39ed96b5-267d-4e8e-b9c0-ee6f4358c7be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c5e734f4-c946-403b-91fd-d26137841ffd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c5e734f4-c946-403b-91fd-d26137841ffd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_26cd483a-3213-4193-9fc4-4884b17ed591" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_26cd483a-3213-4193-9fc4-4884b17ed591" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_01009fe9-cb83-4643-a1de-b303c7e12db0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_01009fe9-cb83-4643-a1de-b303c7e12db0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_eaec4ade-80e0-43a3-8c4e-f2ceb6465267" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_dc5739d2-13cb-4a1d-8fb7-57ab2fe0d918" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_eaec4ade-80e0-43a3-8c4e-f2ceb6465267" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_bdbda3c3-9bc1-4608-bf61-25eb3a23edfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_bdbda3c3-9bc1-4608-bf61-25eb3a23edfc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_f08f21ab-2b73-4c51-aeba-d781bec4fb70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:to="loc_us-gaap_AdditionalPaidInCapital_f08f21ab-2b73-4c51-aeba-d781bec4fb70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_04637dcd-42a4-4024-85a0-da60d5b64475" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:to="loc_us-gaap_CommonStockValue_04637dcd-42a4-4024-85a0-da60d5b64475" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_c4aa06d2-3ebb-4254-b575-35bf3d198618" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_c4aa06d2-3ebb-4254-b575-35bf3d198618" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_70d7b689-a91e-45c2-9ce2-cae7ba674315" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_86bffd44-c276-46c7-9c5d-5cf78c826e4c" xlink:to="loc_us-gaap_PreferredStockValue_70d7b689-a91e-45c2-9ce2-cae7ba674315" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME" xlink:type="simple" xlink:href="fwrg-20250629.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_eb1d5f4a-c772-4bde-99ab-307612c4138a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_da586bf2-e921-4976-9595-1937acb11678" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_eb1d5f4a-c772-4bde-99ab-307612c4138a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_da586bf2-e921-4976-9595-1937acb11678" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd90835-169d-49cd-af6c-311f43a2f3c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_eb1d5f4a-c772-4bde-99ab-307612c4138a" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd90835-169d-49cd-af6c-311f43a2f3c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_f5fcf033-4d4c-43d5-8ce3-15fad7b881de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_36325d88-4f93-47e8-9ab1-a518dc563d07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f5fcf033-4d4c-43d5-8ce3-15fad7b881de" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_36325d88-4f93-47e8-9ab1-a518dc563d07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_ede58a1c-a77f-4e28-bdf0-12fc4df98088" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f5fcf033-4d4c-43d5-8ce3-15fad7b881de" xlink:to="loc_us-gaap_CostsAndExpenses_ede58a1c-a77f-4e28-bdf0-12fc4df98088" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_3c9a6500-1538-43a3-9704-3d9197a918bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_3c9a6500-1538-43a3-9704-3d9197a918bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_12e52644-d05f-4b71-a94f-71e953684a5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_12e52644-d05f-4b71-a94f-71e953684a5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreOpeningCosts_b9d3a15a-2c28-4a8b-9d87-57ae3187f29d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreOpeningCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_PreOpeningCosts_b9d3a15a-2c28-4a8b-9d87-57ae3187f29d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_811537ac-4817-4fde-979d-897f38482567" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_DepreciationAndAmortization_811537ac-4817-4fde-979d-897f38482567" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectLabor_6b722952-be5a-412d-a5cd-feb72bee0718" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostDirectLabor"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_CostDirectLabor_6b722952-be5a-412d-a5cd-feb72bee0718" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldOverhead_2ea42e98-4c0a-4166-b916-ba31a7e1d58f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSoldOverhead"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldOverhead_2ea42e98-4c0a-4166-b916-ba31a7e1d58f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_TransactionIncomeExpenseNet_b6dfb44d-3885-4703-bd3f-cdb98d4ee7d3" xlink:href="fwrg-20250629.xsd#fwrg_TransactionIncomeExpenseNet"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_fwrg_TransactionIncomeExpenseNet_b6dfb44d-3885-4703-bd3f-cdb98d4ee7d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectMaterial_8954879c-e2d6-4829-9394-92932f7f68af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostDirectMaterial"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_CostDirectMaterial_8954879c-e2d6-4829-9394-92932f7f68af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_2363ae25-22ea-4565-91a2-1a456543e340" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_74c00012-a4b6-45e5-95e4-684f112e5c9c" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_2363ae25-22ea-4565-91a2-1a456543e340" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_bd549106-273e-4f3d-a500-def94aca33a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_76abeaa0-f24a-438a-ae92-8d2e9f032db6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_ComprehensiveIncomeNetOfTax_bd549106-273e-4f3d-a500-def94aca33a9" xlink:to="loc_us-gaap_NetIncomeLoss_76abeaa0-f24a-438a-ae92-8d2e9f032db6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_8ceea045-6d53-437b-b826-e5b962fa3ebc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_bd549106-273e-4f3d-a500-def94aca33a9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_8ceea045-6d53-437b-b826-e5b962fa3ebc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_cf9373a3-12b5-4416-8043-8100127b8648" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_bd549106-273e-4f3d-a500-def94aca33a9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_cf9373a3-12b5-4416-8043-8100127b8648" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_335328c5-a2ed-4c41-a9f5-a5359dda7595" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_443f6fe9-d58a-4444-b1fb-07abf065f60a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_335328c5-a2ed-4c41-a9f5-a5359dda7595" xlink:to="loc_us-gaap_OperatingIncomeLoss_443f6fe9-d58a-4444-b1fb-07abf065f60a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_c867877f-0ff0-4c21-9d9e-d2ad4b353b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_335328c5-a2ed-4c41-a9f5-a5359dda7595" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_c867877f-0ff0-4c21-9d9e-d2ad4b353b1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_8f3ccd88-ddef-4a07-b40b-40d1a9b46cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_335328c5-a2ed-4c41-a9f5-a5359dda7595" xlink:to="loc_us-gaap_InterestExpenseNonoperating_8f3ccd88-ddef-4a07-b40b-40d1a9b46cf4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="fwrg-20250629.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_90dac854-b8a7-4d54-ac52-cdfe79147e31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3138bd4-a2ca-4bdb-998c-05e31ba6af77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_90dac854-b8a7-4d54-ac52-cdfe79147e31" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3138bd4-a2ca-4bdb-998c-05e31ba6af77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_26e4a9bc-2b23-4636-babe-fb91e88cfb44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_90dac854-b8a7-4d54-ac52-cdfe79147e31" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_26e4a9bc-2b23-4636-babe-fb91e88cfb44" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07528fa2-4a8b-4b7c-bd96-1e789ad41120" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_90dac854-b8a7-4d54-ac52-cdfe79147e31" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_07528fa2-4a8b-4b7c-bd96-1e789ad41120" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0bc669a1-941c-47d7-8141-b333cc10de76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromInsuranceSettlementInvestingActivities_213e9528-2733-4555-9bed-1e5b15b673d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromInsuranceSettlementInvestingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0bc669a1-941c-47d7-8141-b333cc10de76" xlink:to="loc_us-gaap_ProceedsFromInsuranceSettlementInvestingActivities_213e9528-2733-4555-9bed-1e5b15b673d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_04bbcdeb-f0a7-4880-b8c6-3934fb633c35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0bc669a1-941c-47d7-8141-b333cc10de76" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_04bbcdeb-f0a7-4880-b8c6-3934fb633c35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_70866dd4-dd29-49a2-b70a-403cb6c24664" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0bc669a1-941c-47d7-8141-b333cc10de76" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_70866dd4-dd29-49a2-b70a-403cb6c24664" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_91d1bed7-f9e5-47ea-ba16-7b32a6bfb921" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0bc669a1-941c-47d7-8141-b333cc10de76" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_91d1bed7-f9e5-47ea-ba16-7b32a6bfb921" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_d5e1971e-96a2-4b90-98bb-df84c580cef0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_d5e1971e-96a2-4b90-98bb-df84c580cef0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_9d445d7a-3a9b-4667-8b93-027c666a78a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_9d445d7a-3a9b-4667-8b93-027c666a78a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_c3026994-684c-4593-b3d1-417729e14075" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_c3026994-684c-4593-b3d1-417729e14075" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfOtherLongTermDebt_557a6dd2-2732-43ca-92c1-22f3c6620598" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfOtherLongTermDebt"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_RepaymentsOfOtherLongTermDebt_557a6dd2-2732-43ca-92c1-22f3c6620598" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_cf72dd17-a25d-4f21-9de4-325f8011a4ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_cf72dd17-a25d-4f21-9de4-325f8011a4ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_f5569e75-2a76-4bc2-879d-cb860d6a2a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_f5569e75-2a76-4bc2-879d-cb860d6a2a0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_78701ba9-f8dd-4da8-bfdc-0c4494a5f1c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0c4cd11e-82d9-4b82-bd4c-e5976233f28a" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_78701ba9-f8dd-4da8-bfdc-0c4494a5f1c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_f2e43fb5-1858-4dfc-9f9a-c6c60b6d5339" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_DepreciationAndAmortization_f2e43fb5-1858-4dfc-9f9a-c6c60b6d5339" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e17b92f2-9287-44da-80bb-3408058042c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.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_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_NetIncomeLoss_e17b92f2-9287-44da-80bb-3408058042c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_60de67a9-c3a2-45b3-9ba1-b30ca2a9be4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_ShareBasedCompensation_60de67a9-c3a2-45b3-9ba1-b30ca2a9be4d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_6b225740-ee1b-4910-8c1d-80faebd42c14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_6b225740-ee1b-4910-8c1d-80faebd42c14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_8cb5acbc-a572-4b84-b522-57649274ee0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_8cb5acbc-a572-4b84-b522-57649274ee0c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_GainLossOnModificationOfLease_be06df61-a0d1-4ede-8c80-128ed8d1e0ea" xlink:href="fwrg-20250629.xsd#fwrg_GainLossOnModificationOfLease"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_fwrg_GainLossOnModificationOfLease_be06df61-a0d1-4ede-8c80-128ed8d1e0ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_b5fb7acd-c8b0-4fbf-9f75-791a27847202" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_b5fb7acd-c8b0-4fbf-9f75-791a27847202" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_cae4b8d1-eb72-4370-8d56-90148d2dc78d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_cae4b8d1-eb72-4370-8d56-90148d2dc78d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_3c56153f-10eb-4d1f-bd0a-5d06988628ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainOnBusinessInterruptionInsuranceRecovery"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_3c56153f-10eb-4d1f-bd0a-5d06988628ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_d2559c5c-15db-4086-b2e9-225af638a261" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_d2559c5c-15db-4086-b2e9-225af638a261" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_f4bc15a5-2796-4d6a-8b36-95b00d7faf6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_f4bc15a5-2796-4d6a-8b36-95b00d7faf6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_92f93338-c53d-4569-8bd8-536a4d42b3e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_92f93338-c53d-4569-8bd8-536a4d42b3e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_a8e58772-3cdf-453b-a5ac-dc0bccbc04e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_a8e58772-3cdf-453b-a5ac-dc0bccbc04e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_150c739c-a563-4428-8a11-f902d3af56da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_150c739c-a563-4428-8a11-f902d3af56da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_93af8ef8-b94a-4b68-a908-2a3cceb33aef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_93af8ef8-b94a-4b68-a908-2a3cceb33aef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_c747d303-a3bc-40f1-90ca-5b2fbb339198" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_c747d303-a3bc-40f1-90ca-5b2fbb339198" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_6ff220ae-39f7-4a87-9904-1f8eb91a124d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_6ff220ae-39f7-4a87-9904-1f8eb91a124d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_2f6769cd-350c-45ec-9601-7533def98b1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_2f6769cd-350c-45ec-9601-7533def98b1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_a7ef4b78-dd21-4b5d-91ef-da371bf65c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges"/>
    <link:calculationArc order="19" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_a7ef4b78-dd21-4b5d-91ef-da371bf65c9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_72c06ae6-c643-4e73-8f29-ec51520752cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="20" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a3b1e4f3-74a8-4fb4-be92-0219290bea53" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_72c06ae6-c643-4e73-8f29-ec51520752cc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/RevenuesDetailofContractLiabilitiesDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#RevenuesDetailofContractLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/RevenuesDetailofContractLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_851f4c7b-7263-46f1-a29a-e0ab775c4ec4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_ContractWithCustomerLiabilityGiftCardRevenueCurrent_bce90955-4641-4b71-9de4-0b157f7b67a9" xlink:href="fwrg-20250629.xsd#fwrg_ContractWithCustomerLiabilityGiftCardRevenueCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCurrent_851f4c7b-7263-46f1-a29a-e0ab775c4ec4" xlink:to="loc_fwrg_ContractWithCustomerLiabilityGiftCardRevenueCurrent_bce90955-4641-4b71-9de4-0b157f7b67a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_ContractWithCustomerLiabilityFranchiseFeeRevenueCurrent_0fb8b95b-29ba-470a-8623-4eedd2bd55da" xlink:href="fwrg-20250629.xsd#fwrg_ContractWithCustomerLiabilityFranchiseFeeRevenueCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCurrent_851f4c7b-7263-46f1-a29a-e0ab775c4ec4" xlink:to="loc_fwrg_ContractWithCustomerLiabilityFranchiseFeeRevenueCurrent_0fb8b95b-29ba-470a-8623-4eedd2bd55da" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/AccountsReceivableDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#AccountsReceivableDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/AccountsReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossOtherCurrent_ff4b055d-6155-4d7f-9437-55750bec782b" xlink:href="fwrg-20250629.xsd#fwrg_AccountsReceivableAfterAllowanceForCreditLossOtherCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:to="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossOtherCurrent_ff4b055d-6155-4d7f-9437-55750bec782b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossFranchiseReceivablesCurrent_68aad67e-3b19-46a9-b505-2f53f6f40500" xlink:href="fwrg-20250629.xsd#fwrg_AccountsReceivableAfterAllowanceForCreditLossFranchiseReceivablesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:to="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossFranchiseReceivablesCurrent_68aad67e-3b19-46a9-b505-2f53f6f40500" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossRebatesCurrent_fb5b3681-b9dd-467d-97c5-56ee2cd2aa7d" xlink:href="fwrg-20250629.xsd#fwrg_AccountsReceivableAfterAllowanceForCreditLossRebatesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:to="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossRebatesCurrent_fb5b3681-b9dd-467d-97c5-56ee2cd2aa7d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossThirdPartyDeliveryProvidersCurrent_3d25b807-63ff-46e6-b57a-446854d8aa4f" xlink:href="fwrg-20250629.xsd#fwrg_AccountsReceivableAfterAllowanceForCreditLossThirdPartyDeliveryProvidersCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:to="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossThirdPartyDeliveryProvidersCurrent_3d25b807-63ff-46e6-b57a-446854d8aa4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossGiftCardSalesCurrent_6e1f536a-a40d-462c-a3d8-e113e792da84" xlink:href="fwrg-20250629.xsd#fwrg_AccountsReceivableAfterAllowanceForCreditLossGiftCardSalesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_e8696625-ebdf-4c45-9b5a-320ce1da0c09" xlink:to="loc_fwrg_AccountsReceivableAfterAllowanceForCreditLossGiftCardSalesCurrent_6e1f536a-a40d-462c-a3d8-e113e792da84" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/AccruedLiabilitiesDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#AccruedLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/AccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_2d348dc8-0028-4a04-baea-7a24a5b5c055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_2d348dc8-0028-4a04-baea-7a24a5b5c055" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccruedCreditCardFeesCurrent_bfce1ac6-249c-4a3d-830f-12d40bebd67b" xlink:href="fwrg-20250629.xsd#fwrg_AccruedCreditCardFeesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_fwrg_AccruedCreditCardFeesCurrent_bfce1ac6-249c-4a3d-830f-12d40bebd67b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccruedLiabilitiesOperatingLeasesContingentRentalsCurrent_e711ac5b-5287-4f7c-9f3e-73e53e4f54a9" xlink:href="fwrg-20250629.xsd#fwrg_AccruedLiabilitiesOperatingLeasesContingentRentalsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_fwrg_AccruedLiabilitiesOperatingLeasesContingentRentalsCurrent_e711ac5b-5287-4f7c-9f3e-73e53e4f54a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_257ecc3a-b4d6-4232-ae1b-5718f455f5b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesAndExciseTaxPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_257ecc3a-b4d6-4232-ae1b-5718f455f5b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionPayableCurrent_5b34959d-3614-4e2a-9502-6905bed09e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionPayableCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_ConstructionPayableCurrent_5b34959d-3614-4e2a-9502-6905bed09e3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_AccruedCommonAreaMaintenanceCurrent_9c96b7e7-7d1e-442c-a52a-3a34c7cf6150" xlink:href="fwrg-20250629.xsd#fwrg_AccruedCommonAreaMaintenanceCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_fwrg_AccruedCommonAreaMaintenanceCurrent_9c96b7e7-7d1e-442c-a52a-3a34c7cf6150" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedInsuranceCurrent_c5bcdda1-a922-4394-af3c-1d10b757526f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedInsuranceCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_AccruedInsuranceCurrent_c5bcdda1-a922-4394-af3c-1d10b757526f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_614f3f3d-5f8a-43bd-bc27-f0332353f1b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_614f3f3d-5f8a-43bd-bc27-f0332353f1b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedUtilitiesCurrent_4dd5f102-4c51-47ea-b8ef-829e7fd41368" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedUtilitiesCurrent"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_AccruedUtilitiesCurrent_4dd5f102-4c51-47ea-b8ef-829e7fd41368" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_d88dde3a-2683-4a14-a5a6-2c6d51a5dd39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_e8003711-098a-49cc-81fe-dcdf71c91141" xlink:to="loc_us-gaap_InterestPayableCurrent_d88dde3a-2683-4a14-a5a6-2c6d51a5dd39" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/DebtLongTermDebtNetDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#DebtLongTermDebtNetDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/DebtLongTermDebtNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_127479da-be81-4ae8-8913-4ba33f732980" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_274e1dc3-80ac-469e-be57-2f14d0b34c41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtAndCapitalLeaseObligations_127479da-be81-4ae8-8913-4ba33f732980" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_274e1dc3-80ac-469e-be57-2f14d0b34c41" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_3752f01f-ddb5-4e03-b80e-e67ba210c185" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtAndCapitalLeaseObligations_127479da-be81-4ae8-8913-4ba33f732980" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_3752f01f-ddb5-4e03-b80e-e67ba210c185" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/DebtLongTermDebtNetDetails_1" xlink:type="simple" xlink:href="fwrg-20250629.xsd#DebtLongTermDebtNetDetails_1"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/DebtLongTermDebtNetDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_89210f5b-0eed-4fca-8c10-8aaabff2cc44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_a551452a-7a7d-424c-b1b5-2f00f077fefe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtAndCapitalLeaseObligations_89210f5b-0eed-4fca-8c10-8aaabff2cc44" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_a551452a-7a7d-424c-b1b5-2f00f077fefe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_da3db7a4-5e8c-4fb6-8e35-04fb36ee06f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtAndCapitalLeaseObligations_89210f5b-0eed-4fca-8c10-8aaabff2cc44" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_da3db7a4-5e8c-4fb6-8e35-04fb36ee06f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_d501fd8e-0e2f-4291-9da7-2177bf9de708" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtAndCapitalLeaseObligations_89210f5b-0eed-4fca-8c10-8aaabff2cc44" xlink:to="loc_us-gaap_FinanceLeaseLiability_d501fd8e-0e2f-4291-9da7-2177bf9de708" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/LeasesLeaseAssetsandLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#LeasesLeaseAssetsandLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/LeasesLeaseAssetsandLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_LeaseRightOfUseAsset_ec61af2d-5b93-4072-ab50-077b07861722" xlink:href="fwrg-20250629.xsd#fwrg_LeaseRightOfUseAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_f9f662ca-c5ce-4963-9b33-ec692d8460e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseRightOfUseAsset_ec61af2d-5b93-4072-ab50-077b07861722" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_f9f662ca-c5ce-4963-9b33-ec692d8460e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationCurrent_22190007-6356-41cf-af6b-9190e04591af" xlink:href="fwrg-20250629.xsd#fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseRightOfUseAsset_ec61af2d-5b93-4072-ab50-077b07861722" xlink:to="loc_fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationCurrent_22190007-6356-41cf-af6b-9190e04591af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationNoncurrent_59d72522-9854-4fd4-894a-44591e579c8d" xlink:href="fwrg-20250629.xsd#fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseRightOfUseAsset_ec61af2d-5b93-4072-ab50-077b07861722" xlink:to="loc_fwrg_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationNoncurrent_59d72522-9854-4fd4-894a-44591e579c8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_fwrg_LeaseLiability_2cf69e73-b1d5-4296-b62f-b52f99c55c23" xlink:href="fwrg-20250629.xsd#fwrg_LeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_2a9330da-6285-47bf-ae38-fa43cb8b46b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseLiability_2cf69e73-b1d5-4296-b62f-b52f99c55c23" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_2a9330da-6285-47bf-ae38-fa43cb8b46b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_e21f1ee8-03ed-480e-91dd-de958c9be81d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseLiability_2cf69e73-b1d5-4296-b62f-b52f99c55c23" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_e21f1ee8-03ed-480e-91dd-de958c9be81d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_3c75843f-d64b-4a8b-b561-fe6b9b026590" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseLiability_2cf69e73-b1d5-4296-b62f-b52f99c55c23" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_3c75843f-d64b-4a8b-b561-fe6b9b026590" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_cf38aebf-0c10-4d58-9639-aa9c2bafdf24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_fwrg_LeaseLiability_2cf69e73-b1d5-4296-b62f-b52f99c55c23" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_cf38aebf-0c10-4d58-9639-aa9c2bafdf24" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#LeasesComponentsofLeaseExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_b7147046-6d7b-48be-9c7c-a5d06fb84f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_a4a038e1-5e45-4b25-9360-7999ed949b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_b7147046-6d7b-48be-9c7c-a5d06fb84f8c" xlink:to="loc_us-gaap_VariableLeaseCost_a4a038e1-5e45-4b25-9360-7999ed949b7e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_49337d2a-615e-4f4b-929e-7cf346f17703" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_b7147046-6d7b-48be-9c7c-a5d06fb84f8c" xlink:to="loc_us-gaap_OperatingLeaseCost_49337d2a-615e-4f4b-929e-7cf346f17703" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_0d7d5eb4-a1b5-4a1c-bf0f-14a2b8ea7ab4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_b7147046-6d7b-48be-9c7c-a5d06fb84f8c" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_0d7d5eb4-a1b5-4a1c-bf0f-14a2b8ea7ab4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_6b473dad-e9b6-43e4-b458-4fffee9b890b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_b7147046-6d7b-48be-9c7c-a5d06fb84f8c" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_6b473dad-e9b6-43e4-b458-4fffee9b890b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.firstwatch.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetails" xlink:type="simple" xlink:href="fwrg-20250629.xsd#SegmentInformationScheduleofSegmentReportingInformationbySegmentDetails"/>
  <link:calculationLink xlink:role="http://www.firstwatch.com/role/SegmentInformationScheduleofSegmentReportingInformationbySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5a32053-7332-4aa2-b7e5-9303f0486a03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5a32053-7332-4aa2-b7e5-9303f0486a03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectMaterial_2d813fce-42c8-4731-8c87-ce3d9faad1ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostDirectMaterial"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_CostDirectMaterial_2d813fce-42c8-4731-8c87-ce3d9faad1ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectLabor_aabb0724-3356-4e64-822b-54247d97a020" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostDirectLabor"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_CostDirectLabor_aabb0724-3356-4e64-822b-54247d97a020" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_ab74e9d3-eac6-4716-b031-ceebaf50b346" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_ab74e9d3-eac6-4716-b031-ceebaf50b346" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldOverhead_b7bcf6f2-ceb2-4bcf-8f46-8953bd6d0f23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSoldOverhead"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldOverhead_b7bcf6f2-ceb2-4bcf-8f46-8953bd6d0f23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreOpeningCosts_1972745b-ade4-4f2a-909d-b586d0264427" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreOpeningCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_PreOpeningCosts_1972745b-ade4-4f2a-909d-b586d0264427" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_95bd4131-aad6-4994-affc-4d477681aaa5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_95bd4131-aad6-4994-affc-4d477681aaa5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_e8cd13f0-998a-497c-b091-6cb0d7515d81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_e8cd13f0-998a-497c-b091-6cb0d7515d81" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_a2e683f8-cdd8-4699-95a1-dcf66be3e0c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_DepreciationAndAmortization_a2e683f8-cdd8-4699-95a1-dcf66be3e0c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_60255593-3c34-467f-beca-56bca948489b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_60255593-3c34-467f-beca-56bca948489b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_7084f916-5379-464c-a6b1-26917e7ece06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_InterestExpenseNonoperating_7084f916-5379-464c-a6b1-26917e7ece06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_f6864566-5e03-44be-8fc4-c4352ccce936" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_f6864566-5e03-44be-8fc4-c4352ccce936" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_cf76e9f0-8beb-4703-bcc9-b82e1f42fa9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c432bea1-ac0e-454d-add6-27b0ee22ecaa" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_cf76e9f0-8beb-4703-bcc9-b82e1f42fa9f" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
