Hours Calculator
Work hours and minutes total
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Duration—
Total hours—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- Start 09:00, end 17:30 → 8h 30m — 8.5 total hours
- Start 22:00, end 06:00 (overnight shift) → 8h 0m — 8 total hours
Formula
Duration = end time − start time. If the end time is earlier than the start time, 24 hours are added, so overnight shifts are handled correctly. Decimal hours = duration ÷ 3,600,000 ms, which is what you need for timesheets that bill in tenths or quarters of an hour.
About Hours Calculator
Work hours and minutes total. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is the Hours Calculator free to use? +
Yes, it is completely free with no registration or download required.
Is my date data private? +
Yes. All date calculations happen locally in your browser. Nothing is uploaded or stored.
Does the Hours Calculator account for time zones? +
For time-based tools, calculations use your local device time. Date tools operate on the dates you enter.