Hours worked calculator
Time between two clock times, minus breaks.
About this calculator
Enter start and end times and your break to fill in a timesheet. Night shifts work too: an end time before the start counts as the next day.
Decimal hours are what many payroll systems ask for, so 8 hours 30 minutes is shown as 8.5. Add your hourly pay to see the amount earned before tax.
How it works
Subtracts the start from the end and removes the break. An end before the start counts as the next day.
Worked example
- Start: 09:00
- End: 17:30
- Break: 30 minutes
Time worked: 8 h 0 min
The story behind it
Where the idea came from: Willard Bundy, a jeweller in Auburn, New York, who invented a time clock in 1888.
Bundy's clock let workers record their arrival and departure with their own key. Paper timesheets and digital systems followed, yet the sum stays the same: end time, minus start time, minus breaks. This calculator does that, handles night shifts, and shows decimal hours for payroll.
Why you can trust this calculator
- It runs in your browser. Nothing you type into it is sent anywhere.
- The method is explained on this page, so you can check it yourself.
- Free to use, with no sign-up.
- Results are estimates, so please double-check anything important.
- Spotted a mistake? Tell us and we'll look into it.
After 15 years as a mathematics educator, I built CalculStore to give students, teachers, professionals and anyone working with numbers simple, reliable tools.
Meet the founder