How do I calculate hours between two times?

Enter the start and end time; the calculator shows the duration in hours and minutes, with an optional break subtracted.

Does it support night shifts?

Yes — tick the next-day option for end times past midnight.

Time Calculator

Calculate the duration between two times or add and subtract time. Supports night shifts past midnight. Free time calculator.

Start time

End time

Break (subtracted): 0 min

End time is the next day (night shift)

8 h 30 min

= 8.5 hours (510 minutes)

The time calculator computes the duration between two times or adds/subtracts time. Supports night shifts (times past midnight).

The Time Calculator helps you find the difference between two times or add and subtract time from a given moment. It gives you the hours and minutes without error-prone mental arithmetic.

How the calculator works and what it’s for▾

How the calculator works

To find a difference, the calculator subtracts the start time from the end time and converts the result into hours and minutes. To add time, it adds the chosen duration to the start moment and shows the new clock time.

For example, the span between 9:15 and 17:45 is 8 hours and 30 minutes. These figures are an illustrative example only.

What you enter and what you get

To calculate a difference you enter a start and end time and get the duration in hours and minutes. To add time you enter a starting time and the duration to add.

The result is either the span between two moments or a new clock time, depending on the mode you choose.