Formula
Paid minutes = elapsed shift minutes − unpaid break minutes. Paid hours = paid minutes ÷ 60.
Time & Date
Work Hours Calculator
Work out paid hours from start time, finish time and unpaid break minutes.
Calculator
Working calculator
Live result8h 00m8h 30m elapsed minus 30 break minutes
Formula used
Paid minutes = elapsed shift minutes − unpaid break minutes. Paid hours = paid minutes ÷ 60.
This is the method behind the answer, so the result can be checked rather than simply trusted.What-if check
Break-length sensitivity
Same shift, different unpaid break lengths. This makes the payroll effect visible before rounding or workplace rules are applied.
| Unpaid break | Paid time | Change from current |
|---|---|---|
| 0 min | 8h 30m | +0h 30m |
| 15 min | 8h 15m | +0h 15m |
| 30 min | 8h 00m | Current setting |
| 45 min | 7h 45m | -0h 15m |
| 60 min | 7h 30m | -0h 30m |
Visual proof
Shift bar
The blue segment is paid time. The gold segment is the unpaid break removed from the elapsed shift.
Printable calculation report
Result: 8h 00m. Assumption: Start and finish use 24-hour time.
- Start hour
- 9
- Start minute
- 0
- Finish hour
- 17
- Finish minute
- 30
- Unpaid break
- 30
- Page/date context
- 2026-05-16 UTC page version
- Page URL
- https://calculationtime.com/calculators/work-hours-calculator
Worked example
From 9:00 to 17:30 is 510 elapsed minutes. Subtract a 30-minute unpaid break and the paid result is 480 minutes, or 8 hours. If the break were 45 minutes instead, paid time would be 7 hours and 45 minutes.
Professional note
For payroll records, keep the original start, finish and break entries before any rounding. In real timesheets, break rules, rounding increments, overtime thresholds and local employment law can matter as much as the arithmetic.
Regional and unit assumptions
The default examples use a simple 24-hour clock, a Monday-to-Friday style workday and minutes. No named payroll standard is claimed; this page uses transparent general arithmetic and states its limits.
Assumptions and limitations
- Start and finish use 24-hour time.
- Breaks are entered as unpaid minutes only and deducted after the elapsed shift is measured.
- If the finish time is earlier than the start time, the shift is treated as crossing midnight into the next day.
- The calculator does not decide legal entitlement, award rules, timesheet rounding or payroll compliance.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Paid minutes = elapsed shift minutes − unpaid break minutes. Paid hours = paid minutes ÷ 60.
Standard or basis
The default examples use a simple 24-hour clock, a Monday-to-Friday style workday and minutes. No named payroll standard is claimed; this page uses transparent general arithmetic and states its limits.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
For payroll records, keep the original start, finish and break entries before any rounding. In real timesheets, break rules, rounding increments, overtime thresholds and local employment law can matter as much as the arithmetic.
Related calculators
Questions
What is the difference between duration and work hours?
Duration measures all elapsed time. Work hours subtract unpaid breaks so the result is closer to paid time.
Can this handle night shifts?
Yes. If the finish time is earlier than the start time, the calculator treats the finish as the next day.
Does this calculate wages?
No. It calculates time only. Wage and overtime rates need separate inputs.
How do unpaid breaks affect paid hours?
Unpaid breaks reduce paid time minute for minute. A 30-minute unpaid break removes half an hour from the elapsed shift.
Should I round my start and finish times?
Enter the actual recorded times first. Apply employer, contract or local payroll rounding rules only after the raw paid-time arithmetic is clear.
Calculation note
Work-hours arithmetic sits between ordinary timekeeping and payroll recordkeeping. The calculator gives the transparent time subtraction first, then leaves legal breaks, overtime rules and wage calculations to the governing workplace rule set.
Elapsed time is not always paid time
A shift can run from 9:00 to 17:30, but that does not automatically mean every minute is paid. Unpaid meal breaks, unpaid rest periods or split-shift gaps may need to be deducted before a timesheet total is used.
Recordkeeping matters before the formula
Official employment guidance commonly separates keeping accurate hours records from deciding pay entitlements. That is why this calculator preserves the start time, finish time and break minutes in the printable report instead of only showing the final total.
Overnight shifts need an explicit convention
When the finish time is earlier than the start time, the page treats the finish as occurring on the following day. That convention keeps night-shift arithmetic usable, but it should still be paired with the actual calendar dates in formal records.
Sources and further readingU.S. Department of Labor: Hours worked under the FLSAFair Work Ombudsman: Record-keeping and pay slips