Hours Calculator
Free time-sheet hours calculator — enter start time, end time and breaks for each day to get total hours in hh:mm and decimal, plus a weekly pay estimate.
About the Hours Calculator
The Hours Calculator works like a weekly time sheet: enter a start time, end time and break minutes for each day, and it totals your hours worked instantly — both as hh:mm and as a decimal (the format payroll systems use).
Overnight shifts are handled automatically: if the end time is earlier than the start time, the tool assumes the shift crossed midnight, so a 22:00–06:00 night shift correctly counts as 8 hours. Add an hourly rate and you also get a weekly pay estimate.
A one-click button copies your first filled day across Monday–Friday, so a regular 9-to-5 week takes seconds to fill in. Everything runs live in your browser — nothing is stored or uploaded.
How to Use the Hours Calculator
- 1Enter the start time, end time and unpaid break minutes for each day you worked.
- 2Use 'Copy first filled day to Mon–Fri' if you work the same shift every weekday.
- 3Optionally enter your hourly rate for a pay estimate.
- 4Read the weekly total in hh:mm and decimal hours — updated as you type.
Frequently Asked Questions
How do I convert hours and minutes to decimal hours?
Divide the minutes by 60: 7 hours 30 minutes = 7.50 hours, and 8 hours 45 minutes = 8.75 hours. The calculator shows both formats side by side for every day.
How does the calculator handle overnight or night shifts?
If your end time is before your start time, the tool assumes you worked past midnight. A 21:00 start with a 05:00 end counts as 8 hours (minus any break).
Are breaks subtracted from hours worked?
Yes — the break minutes you enter for each day are subtracted from that day's total, matching how unpaid lunch breaks are treated on most time sheets.
How is the pay estimate calculated?
Total decimal hours × your hourly rate. It doesn't apply overtime multipliers or tax, so treat it as a gross estimate.
Can I calculate hours for just one day?
Yes — fill in only that day's row and leave the rest blank. The total then equals that single day.