Hours Calculator
Enter a start time and an end time. Get the duration in hours, minutes, and decimal hours, with an optional break deduction, or look up a common shift in the chart.
- Decimal hours
- 7.50
- Minutes
- 450
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Copy this HTML into your page. The calculator is free to embed on any site and stays up to date automatically.
<iframe src="https://timesheet.io/en/embed/hours-calculator"
width="100%" height="520" style="border:0"
title="Hours Calculator" loading="lazy"></iframe>
<p>Free <a href="https://timesheet.io/en/tools/hours-calculator">Hours Calculator</a> by <a href="https://timesheet.io/en">Timesheet</a></p>Tired of doing this by hand?
Timesheet tracks your hours on iPhone, Android and the web and turns them into reports, exports and invoices. Try it free for 30 days, no credit card required.
What this calculator does
Pick a start time and an end time. The calculator returns the duration in hours and minutes, decimal hours for payroll, and total minutes. If you took a break, enter the break length in minutes and it will be subtracted from the duration.
How many hours is a shift? Common start and end times
Count from the start time to the end time: 8 AM to 2 PM is 6 hours, 9 to 5 is 8 hours, and a night shift from 10 PM to 6 AM is 8 hours as well. The chart lists the shifts people look up most, in 12-hour and 24-hour time, before and after a 30-minute unpaid break.
| Shift | 24-hour time | Hours | Decimal | After a 30-minute break |
|---|---|---|---|---|
| 6:00 AM to 2:00 PM | 06:00 to 14:00 | 8 hours | 8.00 | 7.50 |
| 6:00 AM to 4:00 PM | 06:00 to 16:00 | 10 hours | 10.00 | 9.50 |
| 6:30 AM to 3:00 PM | 06:30 to 15:00 | 8 hours 30 minutes | 8.50 | 8.00 |
| 7:00 AM to 3:00 PM | 07:00 to 15:00 | 8 hours | 8.00 | 7.50 |
| 7:45 AM to 3:45 PM | 07:45 to 15:45 | 8 hours | 8.00 | 7.50 |
| 8:00 AM to 1:00 PM | 08:00 to 13:00 | 5 hours | 5.00 | 4.50 |
| 8:00 AM to 2:00 PM | 08:00 to 14:00 | 6 hours | 6.00 | 5.50 |
| 8:00 AM to 5:00 PM | 08:00 to 17:00 | 9 hours | 9.00 | 8.50 |
| 8:00 AM to 6:00 PM | 08:00 to 18:00 | 10 hours | 10.00 | 9.50 |
| 8:00 AM to 8:00 PM | 08:00 to 20:00 | 12 hours | 12.00 | 11.50 |
| 8:30 AM to 2:00 PM | 08:30 to 14:00 | 5 hours 30 minutes | 5.50 | 5.00 |
| 9:00 AM to 5:00 PM | 09:00 to 17:00 | 8 hours | 8.00 | 7.50 |
| 11:30 AM to 4:30 PM | 11:30 to 16:30 | 5 hours | 5.00 | 4.50 |
| 2:00 PM to 10:00 PM | 14:00 to 22:00 | 8 hours | 8.00 | 7.50 |
| 2:00 PM to 11:00 PM | 14:00 to 23:00 | 9 hours | 9.00 | 8.50 |
| 6:00 PM to 11:00 PM | 18:00 to 23:00 | 5 hours | 5.00 | 4.50 |
| 10:00 PM to 6:00 AM | 22:00 to 06:00 | 8 hours | 8.00 | 7.50 |
Cross-midnight shifts
Night shifts work fine: 22:00 to 06:00 is recognised as 8 hours, not as a negative number. The calculator adds 24 hours whenever the end time falls before the start time.
From one shift to a full week
If you need to calculate hours for several days at once, use our Time Card Calculator. For continuous tracking with start, stop, breaks, projects, and exports, the Timesheet work hours tracker handles it all in the background.