Case 1
- Start hour (0–23)
- 8h
- Start minute (0–59)
- 0min
- End hour (0–23)
- 16h
- End minute (0–59)
- 30min
- Shift ends
- Same day
- Break to deduct
- 30min
8 h 0 min
- Working time in decimal hours
- 8.0000h
- Minutes before break
- 510min
Work Hours Calculator
Change any value to update the result.
8 h 0 min
Working time after break: 8 h 0 minWorking time in decimal hours: 8.0000 h; Minutes before break: 510 min
- Working time in decimal hours
- 8.0000 h
- Minutes before break
- 510 min
Personal inputs stay on this device. Sharing sends the calculator page without these values.
Examples
Subtract the start time from the end time, then deduct your break in minutes. Read working time as hours and minutes and as decimal hours. Use the 24-hour clock and select next day for an overnight shift. Breaks are entered manually.
The numbers at a glance
Held fixed: Start hour (0–23) 8 h, Start minute (0–59) 0 min, End hour (0–23) 16 h, End minute (0–59) 30 min, Shift ends Same day.
| Break to deduct (min) | Working time after break |
|---|---|
| 0 | 8 h 30 min |
| 10 | 8 h 20 min |
| 20 | 8 h 10 min |
| 30Your value | 8 h 0 min |
| 40 | 7 h 50 min |
| 50 | 7 h 40 min |
| 60 | 7 h 30 min |
Worked examples
Case 2
- Start hour (0–23)
- 22h
- Start minute (0–59)
- 0min
- End hour (0–23)
- 6h
- End minute (0–59)
- 0min
- Shift ends
- Next day (overnight)
- Break to deduct
- 30min
7 h 30 min
- Working time in decimal hours
- 7.5000h
- Minutes before break
- 480min
Case 3
- Start hour (0–23)
- 10h
- Start minute (0–59)
- 35min
- End hour (0–23)
- 15h
- End minute (0–59)
- 30min
- Shift ends
- Same day
- Break to deduct
- 0min
4 h 55 min
- Working time in decimal hours
- 4.9167h
- Minutes before break
- 295min
How it's calculated
t = Δt − p
- StepEnter start and end hours and minutes using the 24-hour clock.
- StepSelect same day or next day; enter the total break in minutes.Break to deduct=30min
- ResultRead hours and minutes plus decimal hours for your timesheet.8 h 0 min
What this number means
The calculator measures one shift, with minute precision, and subtracts exactly the break you enter. In the formula, Δt is the elapsed time, p the break and t the working time, all in minutes. Choose next day explicitly when a shift crosses midnight.
Identical start and end times mean zero on the same day or a full day with next day selected. A break longer than the shift produces an error. Decimal hours are working minutes divided by 60, for multiplication by an hourly rate; the digits after the decimal point are not clock minutes.
No minimum break, paid-break policy or payroll rounding is applied. The calculation uses clock times without dates or time zones, so daylight-saving changes need a separate check. Start, end and break values stay out of shared links.
Questions
How do I calculate work hours with a break?
Enter the start and end times and the break in minutes. The calculator deducts that break and shows working time in hours and minutes plus decimal hours.
How do I calculate an overnight shift?
Use the 24-hour clock and select next day. A shift may last up to 24 hours; an earlier end on the same day is flagged as an error.
Are decimal hours the same as hours and minutes?
No, the minutes are divided by 60 to form the fraction of an hour. Use the decimal-hours result for multiplication by an hourly rate.
Does the calculator deduct a legal minimum break?
No, enter the break that should be deducted yourself. Check the applicable working-time and paid-break rules separately.
Sources and last check
- Math is Fun: time arithmetic and midnightFormula / method · Calculation convention
- Microsoft: time difference in hours and minutesFormula / method
Information, not professional advice.