diff --git a/src/screens/worker/WorkerMonthlyCalendarScreen.tsx b/src/screens/worker/WorkerMonthlyCalendarScreen.tsx
index 38d6034..4c7d14b 100644
--- a/src/screens/worker/WorkerMonthlyCalendarScreen.tsx
+++ b/src/screens/worker/WorkerMonthlyCalendarScreen.tsx
@@ -20,6 +20,7 @@ import useCorrectionRequest from "../../hooks/worker/useCorrectionRequest";
 import { useLogoutHandler } from "../../hooks/common/useLogoutHandler";
 import { WorkerStackParamList } from "../../navigation/WorkerStack";
 import { colors } from "../../constants/colors";
+import { calculateWorkSummary } from "../../utils/workSummary";
 
 const WorkerMonthlyCalendarScreen: React.FC = ({ navigation }: any) => {
   const [isDrawerVisible, setIsDrawerVisible] = useState(false);
@@ -114,9 +115,10 @@ const WorkerMonthlyCalendarScreen: React.FC = ({ navigation }: any) => {
 
   // 월간 요약 계산 (근무 총 시간/급여)
   const monthLabel = `${month + 1}월`;
-  const totalMinutes = works.reduce((sum, w) => sum + w.totalWorkMinutes, 0);
-  const totalHours = Math.round((totalMinutes / 60) * 10) / 10;
-  const estimatedPay = works.reduce((sum, w) => sum + (w.totalSalary ?? 0), 0);
+  const { totalHours, estimatedPay } = useMemo(
+    () => calculateWorkSummary(works),
+    [works]
+  );
 
   return (
     <SafeAreaView style={styles.container}>
diff --git a/src/screens/worker/WorkerWeeklyCalendarScreen.tsx b/src/screens/worker/WorkerWeeklyCalendarScreen.tsx
index 85d1581..3e982da 100644
--- a/src/screens/worker/WorkerWeeklyCalendarScreen.tsx
+++ b/src/screens/worker/WorkerWeeklyCalendarScreen.tsx
@@ -31,6 +31,7 @@ import {
 	getWeekLabel,
 	getWeekRange,
 } from "../../utils/date";
+import { calculateWorkSummary } from "../../utils/workSummary";
 
 type Props = NativeStackScreenProps<WorkerStackParamList, "WorkerHomeMain">;
 
@@ -128,14 +129,9 @@ const WorkerWeeklyCalendarScreen: React.FC<Props> = ({ navigation }) => {
 	} = useCorrectionRequest();
 
 	// 주간 요약 계산
-	const totalMinutes = works.reduce(
-		(sum, w) => sum + w.totalWorkMinutes,
-		0
-	);
-	const totalHours = Math.round((totalMinutes / 60) * 10) / 10;
-	const estimatedPay = works.reduce(
-		(sum, w) => sum + (w.totalSalary ?? 0),
-		0
+	const { totalHours, estimatedPay } = useMemo(
+		() => calculateWorkSummary(works),
+		[works]
 	);
 
 	return (
diff --git a/src/utils/workSummary.ts b/src/utils/workSummary.ts
new file mode 100644
index 0000000..af2314c
--- /dev/null
+++ b/src/utils/workSummary.ts
@@ -0,0 +1,30 @@
+import type { WorkItem } from "../types/worker.types";
+
+export interface WorkSummary {
+	totalHours: number;
+	estimatedPay: number;
+}
+
+/**
+ * 근무 목록에서 요약(총 근무시간, 예상 근무비) 계산. DELETED 근무는 두 값 모두 제외.
+ * - 총 근무시간: COMPLETED 근무의 totalWorkMinutes 합산
+ * - 예상 근무비: COMPLETED + SCHEDULED의 totalSalary 합산
+ *   (백엔드가 SCHEDULED도 totalSalary를 계산해 반환 — PayCheck-backend#177)
+ */
+export const calculateWorkSummary = (works: WorkItem[]): WorkSummary => {
+	let completedMinutes = 0;
+	let estimatedPay = 0;
+
+	for (const work of works) {
+		if (work.status === "DELETED") continue;
+
+		if (work.status === "COMPLETED") {
+			completedMinutes += work.totalWorkMinutes;
+		}
+		estimatedPay += work.totalSalary ?? 0;
+	}
+
+	const totalHours = Math.round((completedMinutes / 60) * 10) / 10;
+
+	return { totalHours, estimatedPay };
+};