Dates & time
Time duration calculator
Find elapsed time between two clock times.
A clear answer. Here’s how.
Subtracts 24-hour clock times, plus your explicit additional-day count. For an overnight interval, set additional days to 1. This is clock arithmetic without time zones or daylight-saving adjustments.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Start time (HH:MM or HH:MM:SS)
- 09:15
- End time (HH:MM or HH:MM:SS)
- 17:45
- Additional calendar days at the end
- 0
Example result
- Duration (H:MM:SS)
- 8:30:00
- Decimal hours
- 8.5
- Total minutes
- 510