A Time Calculator helps you find the difference between two times and add or subtract hours, minutes, and seconds.

Enter the start time and end time, then click Calculate. The result shows the total duration in hours, minutes, and seconds.

Yes. The calculator can handle times that cross midnight. For example, 10:00 PM to 2:00 AM is 4 hours.

Yes. Select Add Time, enter the starting time and the duration you want to add, then calculate the new time.

Yes. Select Subtract Time and enter the hours, minutes, and seconds you want to subtract from the starting time.

Yes. Enter your work start and end times to calculate the total duration of your working hours.

Yes. You can use it for study sessions, workouts, travel, meetings, project tasks, and other activities.

Yes. The calculator is free to use directly in your browser and does not require an account.