Time Duration Calculator
Clock elapsed time — not a timesheet with unpaid break. Click any i for detail.
Clock
Start
i
Start
Clock time you began. |
|
|---|---|
End
i
End
Clock time you stopped. |
|
Overnight
i
Overnight
If end is next day, or if end is earlier and you meant a wrap. |
How to use this calculator
- Enter start and end clock times.
- Let overnight wrap when end is earlier than start, or force next-day.
- Read elapsed hh:mm and decimal hours.
- Use work-hours page if you need unpaid lunch subtracted.
Results explained
Elapsed time on a clock, not a multi-day timesheet. Seconds are not entered; precision is to the minute.
Quick reference: clock duration
09:00 to 17:30 is 8 hours 30 minutes.
| Item | Detail |
|---|---|
| Same day | end − start |
| Overnight | add 24 h when end < start |
| Decimal hours | minutes / 60 added to whole hours |
| Breaks | not subtracted here |
Payroll rounding rules are employer-specific.
How the estimate is built
minutes = endMin − startMin; if minutes < 0 then minutes += 1440.
Example scenario
09:00 to 17:30 → 8:30 (8.5 h).
FAQ
How do I subtract lunch?
Use the work hours calculator with an unpaid break field.
Can this span multiple days?
Only one overnight wrap is modeled, not arbitrary date spans.
Why no seconds?
Inputs are time fields to the minute for simplicity.