diff --git a/backend/src/main/java/com/kaspi/backend/controller/UserGasRecordController.java b/backend/src/main/java/com/kaspi/backend/controller/UserGasRecordController.java
index b5c4154..11ef9f1 100644
--- a/backend/src/main/java/com/kaspi/backend/controller/UserGasRecordController.java
+++ b/backend/src/main/java/com/kaspi/backend/controller/UserGasRecordController.java
@@ -14,10 +14,13 @@
 import com.kaspi.backend.service.UserRecordService;
 import com.kaspi.backend.util.response.CommonResponseDto;
 import com.kaspi.backend.util.response.code.DefaultCode;
+import com.kaspi.backend.util.response.code.ErrorCode;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
@@ -37,12 +40,15 @@ public class UserGasRecordController {
 
     @PostMapping("/user/gas-record")
     public ResponseEntity<CommonResponseDto> postUserGasRecord(@RequestBody UserGasRecordReqDto userGasRecordReqDto) {
-
+//        if (bindingResult.hasErrors()) {
+//            return ResponseEntity.status(HttpStatus.BAD_REQUEST)
+//                    .body(CommonResponseDto.toResponse(ErrorCode.PARAMETER_ERROR));
+//        }
         //주유소 객체 얻기
         GasStation gasStation = gasStationService.getGasStationByNo(userGasRecordReqDto.getGasStationNo());
 
         //유저의 주유량
-        Long userGasAmount = userRecordService.calTodayUserGasAmount(userGasRecordReqDto, gasStation);
+        double userGasAmount = userRecordService.calTodayUserGasAmount(userGasRecordReqDto, gasStation);
 
         //전국 유가 평균 받기
         Long nationalAvgOilPrice = opinetService.nationalAvgOilPrice(userGasRecordReqDto.getGasType());
@@ -57,7 +63,7 @@ public ResponseEntity<CommonResponseDto> postUserGasRecord(@RequestBody UserGasR
         //유저 최종 저장
         userRecordService.saveUserGasRecord(userGasRecordReqDto,
                 gasStation,
-                userGasAmount,
+                (long) userGasAmount,
                 usersSavingPrice);
 
         return ResponseEntity.status(HttpStatus.CREATED)
diff --git a/backend/src/main/java/com/kaspi/backend/dto/UserGasRecordReqDto.java b/backend/src/main/java/com/kaspi/backend/dto/UserGasRecordReqDto.java
index 0335c1f..1e9a110 100644
--- a/backend/src/main/java/com/kaspi/backend/dto/UserGasRecordReqDto.java
+++ b/backend/src/main/java/com/kaspi/backend/dto/UserGasRecordReqDto.java
@@ -3,6 +3,7 @@
 import com.kaspi.backend.enums.GasType;
 import lombok.Builder;
 import lombok.Getter;
+import org.checkerframework.checker.index.qual.Positive;
 
 import java.util.Date;
 
@@ -11,6 +12,7 @@
 public class UserGasRecordReqDto {
 
     private GasType gasType;
+    @Positive
     private Long refuelingPrice;
     private Long gasStationNo;
 }
diff --git a/backend/src/main/java/com/kaspi/backend/service/UserRecordService.java b/backend/src/main/java/com/kaspi/backend/service/UserRecordService.java
index 8b950ca..f3307ea 100644
--- a/backend/src/main/java/com/kaspi/backend/service/UserRecordService.java
+++ b/backend/src/main/java/com/kaspi/backend/service/UserRecordService.java
@@ -38,21 +38,25 @@ public class UserRecordService {
     /**
      * 사용자로 부터 받은 주유금액, 유종과 주유소 정보로 얼마만큼 넣었는지 계산하는 로직
      */
-    public Long calTodayUserGasAmount(UserGasRecordReqDto userGasRecordReqDto, GasStation gasStation) {
+    public double calTodayUserGasAmount(UserGasRecordReqDto userGasRecordReqDto, GasStation gasStation) {
         Optional<Long> todayGasPrice = gasDetailDao.findTodayGasPrice(gasStation.getStationNo(),
                 userGasRecordReqDto.getGasType().name(),
                 GasDetail.getNowDateToStr());//오늘 날짜로 계산
+        validTodayGasPrice(userGasRecordReqDto, gasStation, todayGasPrice);
+        double userGasAmount = (double)userGasRecordReqDto.getRefuelingPrice() / todayGasPrice.get();
+        log.info("사용자가 주유한 가스타입:{}, 주유량:{}", userGasRecordReqDto.getGasType().name(), userGasAmount);
+        return userGasAmount;
+    }
+
+    private static void validTodayGasPrice(UserGasRecordReqDto userGasRecordReqDto, GasStation gasStation, Optional<Long> todayGasPrice) {
         if (todayGasPrice.isEmpty() || todayGasPrice.get() == 0) {
             log.error("DB에 오늘날짜에 해당되는 주유 가격 정보가 존재하지 않음 가스타입:{}, 주유소PK:{}", userGasRecordReqDto.getGasType().name(), gasStation.getStationNo());
             throw new SqlNotFoundException(ErrorCode.SQL_NOT_FOUND);
         }
-        Long userGasAmount = (long) Math.round(userGasRecordReqDto.getRefuelingPrice() / todayGasPrice.get());
-        log.info("사용자가 주유한 가스타입:{}, 주유량:{}", userGasRecordReqDto.getGasType().name(), userGasAmount);
-        return userGasAmount;
     }
 
-    public Long calUserSavingAmount(Long userRefuelingPrice, Long userGasAmount, Long nationalAvgOilPrice) {
-        return nationalAvgOilPrice * userGasAmount-userRefuelingPrice;
+    public Long calUserSavingAmount(Long userRefuelingPrice, double userGasAmount, Long nationalAvgOilPrice) {
+        return (long) (nationalAvgOilPrice * userGasAmount-userRefuelingPrice);
     }
 
 
diff --git a/backend/src/test/java/com/kaspi/backend/controller/UserGasRecordControllerTest.java b/backend/src/test/java/com/kaspi/backend/controller/UserGasRecordControllerTest.java
index 8c22f1e..5f6047d 100644
--- a/backend/src/test/java/com/kaspi/backend/controller/UserGasRecordControllerTest.java
+++ b/backend/src/test/java/com/kaspi/backend/controller/UserGasRecordControllerTest.java
@@ -77,7 +77,7 @@ void postUserGasRecord() throws Exception {
 
         when(gasStationService.getGasStationByNo(userGasRecordReqDto.getGasStationNo())).thenReturn(gasStation);
         when(userRecordService.calTodayUserGasAmount(userGasRecordReqDto, gasStation))
-                .thenReturn(userGasAmount);// 유저가 총 넣은 가스 리터 수
+                .thenReturn(Double.valueOf(userGasAmount));// 유저가 총 넣은 가스 리터 수
         when(opinetService.nationalAvgOilPrice(userGasRecordReqDto.getGasType())).thenReturn(
                 nationalGasAvg);//전국 리터당 평균 가격
         when(userRecordService.calUserSavingAmount(userGasRecordReqDto.getRefuelingPrice(),
diff --git a/backend/src/test/java/com/kaspi/backend/service/UserRecordServiceTest.java b/backend/src/test/java/com/kaspi/backend/service/UserRecordServiceTest.java
index e18741d..1f4ff56 100644
--- a/backend/src/test/java/com/kaspi/backend/service/UserRecordServiceTest.java
+++ b/backend/src/test/java/com/kaspi/backend/service/UserRecordServiceTest.java
@@ -73,7 +73,7 @@ void calTodayUserGasAmount() {
                 GasDetail.getNowDateToStr())) // 항상 오늘날짜로 기준
                 .thenReturn(Optional.of(gasolinePerLiterPrice));//가솔린 1L당 1000원
         //when
-        Long userGasAmount = userRecordService.calTodayUserGasAmount(userGasRecordReqDto, gasStation);
+        double userGasAmount = userRecordService.calTodayUserGasAmount(userGasRecordReqDto, gasStation);
         //then
         assertEquals(5L, userGasAmount);
     }