How to use this calculator
Calculate one shift or a multi-row timesheet with unpaid breaks, clock rounding and optional overtime. Weekly overtime groups shifts by ISO Monday–Sunday week. Daily overtime groups shifts by entered date. These are custom arithmetic assumptions, not legal payroll rules.
- Enter timesheet type, shift start, shift end and review the remaining options.
- Select Calculate or change a value to update the result. Read the result label and units before copying.
- Use Reset to restore the worked starting values.
Formula and method
Excludes overtime rules, tax, paid-break laws, and daylight-saving transitions.
Worked example
09:00–17:30 minus a 30-minute break gives 8 paid hours.
Questions about work hours calculator
How many hours am I working?
Subtract your shift start from your end time, then subtract unpaid breaks. A 9:00 AM–5:30 PM shift (09:00–17:30) lasts 8 hours 30 minutes; with a 30-minute unpaid break, paid time is 8 hours.
How do I calculate hours between two times?
Convert both clock times to minutes after midnight and subtract, then divide by 60 for decimal hours. From 08:15 to 12:45, the difference is 270 minutes, or 4.5 hours. Thirty minutes is 0.5 hours, not 0.30 hours.
How do I calculate work hours excluding breaks?
Enter the total unpaid break in minutes. From 09:00 to 17:30, subtracting 45 minutes gives 7 hours 45 minutes, or 7.75 paid hours. Do not subtract a paid break. The tool rejects a break longer than the shift.
How do I calculate overnight working hours?
Enter the evening start and morning end: 10:00 PM–6:00 AM (22:00–06:00) is 8 hours before breaks. An end time earlier than the start is treated as the next day. This clock-time calculation does not account for daylight saving changes; equal start and end times represent zero hours.
How do I calculate weekly working hours?
Choose the weekly timesheet mode and enter each shift with its date, start, end, and unpaid break minutes. Sum the paid hours: five 8-hour shifts give 40 hours. Review rounding and overtime settings; these are arithmetic assumptions, not a determination of local payroll requirements.
What assumptions should I check?
Excludes overtime rules, tax, paid-break laws, and daylight-saving transitions.
Are my inputs saved?
Calculations run in your browser. We store only tool IDs for favorites and recent tools. A calculation link contains your inputs only when you explicitly choose to copy one.