Time Duration Calculator
Find the duration between two clock times, in hours and minutes. Handles overnight spans.
Time Duration Calculator
Time between two clock times (wraps past midnight if the end is earlier).
8 hours 30 minutes From 09:00 to 17:30 is 510 minutes, or 8.5 hours.
What This Calculator Does
Working out the time between two clock times has a catch: clocks reset at 12, so you cannot always just subtract. This tool finds the duration in hours and minutes (and as decimal hours, handy for timesheets). If the end time is earlier than the start, it assumes the span runs past midnight - like a shift from 10 PM to 6 AM.
How to Use It
- Enter the start time and the end time.
- Read the duration in hours and minutes.
Worked Examples
| Start | End | Duration |
|---|---|---|
| 09:00 | 17:30 | 8 hours 30 minutes |
| 22:00 | 06:00 | 8 hours 0 minutes |
| 13:15 | 14:00 | 0 hours 45 minutes |
FAQ
How do you calculate the hours between two times?
Convert each time to minutes from midnight, subtract, then turn the result back into hours and minutes. From 09:00 to 17:30 is 510 minutes, or 8.5 hours.
What if the end time is earlier than the start time?
It assumes the end is on the next day (an overnight span), so 22:00 to 06:00 is 8 hours.