Time Duration Calculator

Calculate the exact duration between two times in hours, minutes, and seconds.

Start Hour (0-23)

Start Minute

End Hour (0-23)

End Minute

Use Cases

Calculate work shift durations
Track time spent on tasks
Plan meeting and event lengths

Frequently Asked Questions

What happens if the end time is before the start time?

The calculator assumes the end time is on the following day. For example, 10 PM to 2 AM gives a duration of 4 hours.

Does this support 12-hour AM/PM format?

Currently uses 24-hour format (0-23). Convert 12-hour time by adding 12 to PM hours (e.g., 2 PM = 14, 11 PM = 23).

Can I calculate durations longer than 24 hours?

For durations longer than 24 hours, use the Date Difference Calculator instead, which supports multi-day calculations.

What is the difference between elapsed time and duration?

Duration is the time between two specific times on the same day (or next day). Elapsed time can span multiple days and is better calculated with a date-aware tool.

Related Calculators

Hours Calculator Work Hours Calculator Time Card Calculator