Work Time Calculator
Clock in, clock out, break length: that is all you need. You get the time actually worked, ready to paste into a timesheet.
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The formula
Time worked = clock-out - clock-in - unpaid break.
Using it for a timesheet
Enter the start and end of each shift and the unpaid break in minutes. We show the result as hours and minutes, and as decimal hours, so you can multiply it by an hourly rate straight away.
Pay example
You work 08:30 to 17:00 with a 30 minute lunch. That is 8 hours 30 minutes minus 30 minutes, so 8 hours or 8.0 decimal hours. At 18.50 an hour, that is 148.00 for the day.
A note on rounding
Some employers round to the nearest 5, 10 or 15 minutes. We do not round, so you see the true time. Check how your employer rounds before comparing with your payslip.
Examples to check
Type these into the calculator above to see how it behaves. Every result below was produced by the same calculator code that runs on this page.
| What you enter | What you get |
|---|---|
| Start time: 09:00; End time: 17:30; Unpaid break (minutes): 30 | Hours worked: 8:00 (h:mm) |
| Start time: 08:15; End time: 16:45; Unpaid break (minutes): 45 | Hours worked: 7:45 (h:mm) |
| Start time: 22:00; End time: 06:00 | Hours worked: 8:00 (h:mm) |
| Start time: 13:10; End time: 14:55 | Hours worked: 1:45 (h:mm) |
Work Time Calculator: frequently asked questions
Are paid breaks deducted?
Only deduct breaks that are unpaid. If your 15 minute tea break is paid, leave the break field at zero.
What if I work past midnight?
It works. If clock-out is earlier than clock-in, we assume the shift ended the next day.
Does it take leap years into account?
Yes. Calculations use real calendar dates, including leap days and the different lengths of months.
Is what I enter in this calculator saved or sent anywhere?
No. The calculation runs in your browser, so what you enter is not sent to our servers. We only count, anonymously, whether a tool ran successfully.
Is this calculator free to use?
Yes. It is free, needs no sign-up and has no usage limit.
Last reviewed: October 3, 2026