How to use it
- For one shift, type the start and end times (17:30 or 5:30 PM) and any unpaid break in minutes.
- For a week, fill in each day’s in and out times and breaks; choose rounding if your workplace rounds punches; add an hourly rate to see gross pay with overtime.
- Convert decimal hours to hours and minutes, or back, at the bottom.
The rules it follows
Overtime: the Department of Labor’s Fact Sheet #23 says covered non-exempt employees must get at least one and one-half times their regular rate for hours over 40 in a workweek, a fixed period of seven consecutive 24-hour days, and that hours cannot be averaged over two or more weeks. Rounding: under 29 CFR 785.48(b), the Department accepts rounding to the nearest five minutes, tenth of an hour or quarter hour when it does not, over time, shortchange employees; a 1994 opinion letter describes these practices. This calculator rounds each punch to the nearest increment, so with quarter hours 8:07 becomes 8:00 and 8:08 becomes 8:15.
What we tested
On October 14, 2026 we checked the page’s own functions against worked cases and 2,000 random shifts with breaks and every rounding option (2,000 matched an independent calculation). In Chromium: 9:00 to 17:30 with a 30-minute break showed 8:00 hours; 10:00 PM to 6:30 AM showed 8:30 overnight; the sample week of 8:58-17:07 shifts came to 38:15 unrounded and 37:30 with quarter-hour rounding; adding a 4-hour Saturday at $20 an hour gave 41.50 hours, 1.50 of them overtime, and $845.00 gross; 7.75 converted to 7:45; and the page fitted a 390 px phone screen with no errors
| Check | Result |
|---|---|
| parse 24 h and AM/PM | pass |
| 9:00 to 17:30 with 30 min break = 8:00 | pass |
| overnight 22:00 to 6:30 = 8:30 | pass |
| quarter hour: 8:07 rounds down, 8:08 up | pass |
| tenth of an hour: 3 min up, 2 down | pass |
| five minutes: 2 down, 3 up | pass |
| 41.25 h at $20: 40 regular, 1.25 overtime, $837.50 | pass |
| 38 h: no overtime | pass |
| decimal 7.75 h = 7:45 | pass |
This tool does arithmetic on the times you enter; it is not payroll software or legal advice, and state rules can differ from the federal baseline.
Sources
Checked on .
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools