Time Duration Calculator (End Time − Start Time)

Enter a start and end time to instantly get the elapsed duration. Handles overnight shifts that cross midnight and also shows the total in minutes, decimal hours, and seconds.

Input

Start time

End time

End time is the next day (crosses midnight)

Result

Elapsed time

8h30min

Total (minutes)

510 min

Total (hours)

8.5 h

Total (seconds)

30,600 sec

How it works

Enter a start and end time in hours and minutes, and the elapsed time between them is calculated automatically as "X hours Y minutes".
For night shifts, all-nighters, or any period that crosses midnight, tick "End time is the next day" so 24 hours are added and the result is correct.
The elapsed time is also shown as total minutes, total hours (decimal), and total seconds, so you can use whichever fits wage calculations or data tallies.
When the end time is earlier than the start time, the tool warns you that the period may cross midnight, so you don't forget to tick the box.
Calculations treat 1 hour as 60 minutes, so total hours (decimal) convert 30 minutes to 0.5 hours, for example.
To subtract break time, split the shift into separate periods, calculate each one, and add the results together.

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