diff --git a/src/lib/counter-do.ts b/src/lib/counter-do.ts
index 062f7c4..2708503 100644
--- a/src/lib/counter-do.ts
+++ b/src/lib/counter-do.ts
@@ -1,26 +1,11 @@
 import type { DurableObjectNamespace, DurableObjectState } from '@cloudflare/workers-types';
+import type { Session, BettingInfo } from './types';
+import { applyBetResults } from './game-results';
 
 export interface Env {
 	COUNTER: DurableObjectNamespace;
 }
 
-interface Session {
-	id: string;
-	webSocket: WebSocket;
-	nickname?: string;
-	capital?: number;
-	// 배팅 정보
-	oddBet: number;
-	evenBet: number;
-	bigBet: number;
-	smallBet: number;
-	// 결과
-	oddResult?: 'win' | 'lose' | null;
-	evenResult?: 'win' | 'lose' | null;
-	bigResult?: 'win' | 'lose' | null;
-	smallResult?: 'win' | 'lose' | null;
-	lastWinAmount?: number;
-}
 
 export class CounterDurableObject {
 	private ctx: DurableObjectState;
@@ -165,60 +150,9 @@ export class CounterDurableObject {
 
 		// 주사위 합계
 		const sum = this.dice1 + this.dice2 + this.dice3;
-		const isOdd = sum % 2 === 1;
-		const isBig = sum >= 10;
 
-		// 각 세션별로 배팅 결과 계산
-		this.sessions.forEach((session) => {
-			if (!session.capital) return;
-
-			let winAmount = 0;
-
-			// 홀수 배팅 결과
-			if (session.oddBet > 0) {
-				if (isOdd) {
-					session.oddResult = 'win';
-					winAmount += session.oddBet * 2;
-				} else {
-					session.oddResult = 'lose';
-				}
-			}
-
-			// 짝수 배팅 결과
-			if (session.evenBet > 0) {
-				if (!isOdd) {
-					session.evenResult = 'win';
-					winAmount += session.evenBet * 2;
-				} else {
-					session.evenResult = 'lose';
-				}
-			}
-
-			// 대 배팅 결과
-			if (session.bigBet > 0) {
-				if (isBig) {
-					session.bigResult = 'win';
-					winAmount += session.bigBet * 2;
-				} else {
-					session.bigResult = 'lose';
-				}
-			}
-
-			// 소 배팅 결과
-			if (session.smallBet > 0) {
-				if (!isBig) {
-					session.smallResult = 'win';
-					winAmount += session.smallBet * 2;
-				} else {
-					session.smallResult = 'lose';
-				}
-			}
-
-			// 자본금 업데이트
-			const totalBet = session.oddBet + session.evenBet + session.bigBet + session.smallBet;
-			session.lastWinAmount = winAmount - totalBet;
-			session.capital += winAmount;
-		});
+		// 추출된 함수로 배팅 결과 계산 및 세션 갱신
+		applyBetResults(this.sessions, sum);
 
 		// 상태 저장
 		this.ctx.storage.put('noMoreBet', this.noMoreBet);
@@ -289,13 +223,7 @@ export class CounterDurableObject {
 		const connectedWebSockets = this.ctx.getWebSockets();
 
 		// 전체 사용자 배팅 내역 수집
-		const allBettings: Array<{
-			nickname: string;
-			oddBet: number;
-			evenBet: number;
-			bigBet: number;
-			smallBet: number;
-		}> = [];
+		const allBettings: BettingInfo[] = [];
 
 		this.sessions.forEach((session) => {
 			if (session.nickname && (session.oddBet > 0 || session.evenBet > 0 || session.bigBet > 0 || session.smallBet > 0)) {
@@ -341,4 +269,3 @@ export class CounterDurableObject {
 		});
 	}
 }
-
diff --git a/src/lib/game-results.ts b/src/lib/game-results.ts
new file mode 100644
index 0000000..03c1f04
--- /dev/null
+++ b/src/lib/game-results.ts
@@ -0,0 +1,62 @@
+import type { Session } from './types';
+
+/**
+ * 주사위 합계를 기준으로 모든 세션의 배팅 결과를 계산하고 세션 객체를 직접 갱신합니다.
+ * 승리 시 배팅금액 * 2 지급, 패배 시 이미 차감된 상태 유지.
+ * lastWinAmount = (총 승리 수령액 - 총 배팅액)
+ */
+export function applyBetResults(sessions: Map<WebSocket, Session>, sum: number) {
+	const isOdd = sum % 2 === 1;
+	const isBig = sum >= 10; // 10~18: 대
+
+	sessions.forEach((session) => {
+		if (session.capital === undefined) return; // 아직 사용자 설정 안됨
+
+		let winAmount = 0;
+
+		// 홀수 배팅
+		if (session.oddBet > 0) {
+			if (isOdd) {
+				session.oddResult = 'win';
+				winAmount += session.oddBet * 2;
+			} else {
+				session.oddResult = 'lose';
+			}
+		}
+
+		// 짝수 배팅
+		if (session.evenBet > 0) {
+			if (!isOdd) {
+				session.evenResult = 'win';
+				winAmount += session.evenBet * 2;
+			} else {
+				session.evenResult = 'lose';
+			}
+		}
+
+		// 대 배팅
+		if (session.bigBet > 0) {
+			if (isBig) {
+				session.bigResult = 'win';
+				winAmount += session.bigBet * 2;
+			} else {
+				session.bigResult = 'lose';
+			}
+		}
+
+		// 소 배팅
+		if (session.smallBet > 0) {
+			if (!isBig) {
+				session.smallResult = 'win';
+				winAmount += session.smallBet * 2;
+			} else {
+				session.smallResult = 'lose';
+			}
+		}
+
+		const totalBet = session.oddBet + session.evenBet + session.bigBet + session.smallBet;
+		session.lastWinAmount = winAmount - totalBet;
+		session.capital = (session.capital ?? 0) + winAmount;
+	});
+}
+
diff --git a/src/lib/types.ts b/src/lib/types.ts
new file mode 100644
index 0000000..1beb687
--- /dev/null
+++ b/src/lib/types.ts
@@ -0,0 +1,26 @@
+export interface Session {
+	id: string;
+	webSocket: WebSocket;
+	nickname?: string;
+	capital?: number;
+	// 배팅 정보
+	oddBet: number;
+	evenBet: number;
+	bigBet: number;
+	smallBet: number;
+	// 결과
+	oddResult?: 'win' | 'lose' | null;
+	evenResult?: 'win' | 'lose' | null;
+	bigResult?: 'win' | 'lose' | null;
+	smallResult?: 'win' | 'lose' | null;
+	lastWinAmount?: number;
+}
+
+export interface BettingInfo {
+	nickname: string;
+	oddBet: number;
+	evenBet: number;
+	bigBet: number;
+	smallBet: number;
+}
+
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index 27b5dcb..786dc01 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -390,7 +390,8 @@
 				{#if oddBet > 0 || evenBet > 0 || bigBet > 0 || smallBet > 0}
 					<div class="grid grid-cols-2 gap-3 mb-4">
 						{#if oddBet > 0}
-							<div class="p-3 rounded-lg {oddResult === 'win' ? 'bg-green-100 border-2 border-green-300' : oddResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
+							<div
+								class="p-3 rounded-lg {oddResult === 'win' ? 'bg-green-100 border-2 border-green-300' : oddResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
 								<div class="text-sm text-gray-600">홀수 배팅</div>
 								<div class="text-lg font-bold">{oddBet.toLocaleString()}원</div>
 								{#if oddResult === 'win'}
@@ -401,7 +402,8 @@
 							</div>
 						{/if}
 						{#if evenBet > 0}
-							<div class="p-3 rounded-lg {evenResult === 'win' ? 'bg-green-100 border-2 border-green-300' : evenResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
+							<div
+								class="p-3 rounded-lg {evenResult === 'win' ? 'bg-green-100 border-2 border-green-300' : evenResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
 								<div class="text-sm text-gray-600">짝수 배팅</div>
 								<div class="text-lg font-bold">{evenBet.toLocaleString()}원</div>
 								{#if evenResult === 'win'}
@@ -412,7 +414,8 @@
 							</div>
 						{/if}
 						{#if bigBet > 0}
-							<div class="p-3 rounded-lg {bigResult === 'win' ? 'bg-green-100 border-2 border-green-300' : bigResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
+							<div
+								class="p-3 rounded-lg {bigResult === 'win' ? 'bg-green-100 border-2 border-green-300' : bigResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
 								<div class="text-sm text-gray-600">대 배팅</div>
 								<div class="text-lg font-bold">{bigBet.toLocaleString()}원</div>
 								{#if bigResult === 'win'}
@@ -423,7 +426,8 @@
 							</div>
 						{/if}
 						{#if smallBet > 0}
-							<div class="p-3 rounded-lg {smallResult === 'win' ? 'bg-green-100 border-2 border-green-300' : smallResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
+							<div
+								class="p-3 rounded-lg {smallResult === 'win' ? 'bg-green-100 border-2 border-green-300' : smallResult === 'lose' ? 'bg-red-100 border-2 border-red-300' : 'bg-gray-100 border-2 border-gray-300'}">
 								<div class="text-sm text-gray-600">소 배팅</div>
 								<div class="text-lg font-bold">{smallBet.toLocaleString()}원</div>
 								{#if smallResult === 'win'}