Time Duration Calculator
Calculate the duration between a start time and an end time, including overnight periods.
How this time duration calculator works
Enter a start time and an end time. The calculator shows the duration in hours and minutes, as well as total minutes and total seconds.
If the end time is earlier than the start time, the calculator assumes the end time occurs on the following day.
Note: This calculator measures one continuous time period
of up to 24 hours.