Time duration calculator

Measure the length of a shift or interval between two times of day. If the end is before the start, the period is assumed to cross midnight.

Also see the hours and minutes calculator.

Frequently asked questions

The calculator treats that as an overnight period and adds 24 hours. For example, 22:00 to 06:00 is 8 hours.

This tool works in whole minutes. Use the unit converter if you need seconds.