diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportService.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportService.cs
index 21fba541..3f498ad9 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportService.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportService.cs
@@ -177,8 +177,7 @@ public class DailyReportService : IDailyReportService
 				datesRange.To = finishDate;
 		}
 
-		result.Count = (int)(Math.Ceiling((datesRange.To - DateTimeOffset.UnixEpoch).TotalDays) 
-				- Math.Floor((datesRange.From - DateTimeOffset.UnixEpoch).TotalDays));
+		result.Count = (datesRange.To.Day - DateTimeOffset.UnixEpoch.Day) - (datesRange.From.Day - DateTimeOffset.UnixEpoch.Day);
 
 		var existingDailyReports = await dailyReportRepository.GetAsync(idWell, request, cancellationToken);
 
diff --git a/AsbCloudWebApi.Tests/Services/DailyReportServiceTest.cs b/AsbCloudWebApi.Tests/Services/DailyReportServiceTest.cs
index 38f1959e..90c00957 100644
--- a/AsbCloudWebApi.Tests/Services/DailyReportServiceTest.cs
+++ b/AsbCloudWebApi.Tests/Services/DailyReportServiceTest.cs
@@ -157,7 +157,7 @@ public class DailyReportServiceTest
         IdParentCategory = 4001,
         IdWellSectionType = 1,
         OperationCategoryName = "Механическое. бурение",
-        DateStart = new DateTime(2023, 10, 26),
+        DateStart = new DateTime(2023, 10, 26, 0, 0, 0),
         DepthStart = 80,
         DepthEnd = 150,
         DurationHours = 8,
@@ -169,7 +169,7 @@ public class DailyReportServiceTest
         OperationCategoryName = "Механическое. бурение",
         IdWellSectionType = 1,
         IdParentCategory = 4001,
-        DateStart = new DateTime(2023, 10, 26),
+        DateStart = new DateTime(2023, 10, 26, 23, 59, 59),
         DepthStart = 150,
         DepthEnd = 200,
         DurationHours = 8,
@@ -507,7 +507,7 @@ public class DailyReportServiceTest
     public async Task GetAsync_ShouldReturn_FictiveDailyReport()
     {
         //arrange
-        var expectedCount = (fakeLastFactWellOperation.DateStart - fakeFirstFactWellOperation.DateStart).TotalDays + 1;
+        var expectedCount = fakeLastFactWellOperation.DateStart.Day - fakeFirstFactWellOperation.DateStart.Day;
 
         //act
         var result = await dailyReportService.GetAsync(idWell, new FileReportRequest(), CancellationToken.None);