Hours Calculator
Timesheet math without the headache: start time, end time, minus the break — in both normal and decimal hours, overnight shifts included.
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Last reviewed: July 20, 2026 · Formulas verified by automated tests before every release.
Minutes to decimal — the cheat sheet
- 15 min = 0.25 · 20 min = 0.33 · 30 min = 0.5 · 45 min = 0.75
- Formula: decimal = minutes ÷ 60. The calculator does it for you, rounded to two places.
Who uses this daily
Hourly workers checking a paycheck, freelancers billing by the hour, managers approving timesheets, and anyone who ever argued with payroll about 15 minutes. The overnight mode covers night shifts: 22:00 → 06:00 correctly counts 8 hours across midnight.
Frequently asked questions
How do I calculate hours worked?
End time minus start time, minus unpaid breaks. A 9:00–17:30 day with a 30-minute lunch is 8 hours of work.
What is decimal time and why do timesheets use it?
Payroll systems multiply hours by an hourly rate, so minutes are converted to decimals: 8 h 30 min = 8.5 hours; 7 h 45 min = 7.75. The calculator shows both formats.
Does it handle overnight shifts?
Yes — if the end time is earlier than the start (22:00 → 06:00), it assumes the shift crosses midnight and counts correctly.
Are breaks paid or unpaid?
Rules vary by country and employer: short rest breaks are often paid, meal breaks usually are not. Enter only unpaid break minutes here — that is what reduces payable time.