Calculate the duration between two times in hours, minutes and seconds. Handles overnight time spans automatically.
Enter a start time and an end time in HH:MM format to see the elapsed duration. Overnight spans are handled automatically.
A time duration calculator works out the elapsed time between two clock times.
Enter start and end times in 24-hour HH:MM format and the calculator instantly
shows the duration in hours and minutes, total minutes and total seconds.
It automatically handles overnight spans — if you enter 23:00 as the start and
02:00 as the end, it correctly calculates 3 hours across midnight. The decimal
hours breakdown is useful for timesheet calculations and billing.
This tool is handy for tracking work hours, calculating travel time, measuring
cooking or exercise duration, and billing by the hour.
How to use
Enter the start time in HH:MM (24-hour format).
Enter the end time.
Read the duration in hours and minutes below.
Formula
Duration is the difference between end and start times.