Add and subtract hours, minutes, and seconds, or find the elapsed time between two clock times — with decimal-hours output for timesheets and payroll.
Clock time is base-60: 60 seconds make a minute and 60 minutes make an hour. A standard calculator treats 2.45 as two-and-forty-five-hundredths, not 2 h 45 min — so 2.45 + 1.30 = 3.75 is wrong as clock time. Done correctly: 2 h 45 min + 1 h 30 min → minutes: 45 + 30 = 75 = 1 h 15 min, carry the hour → 4 h 15 min. This calculator carries minutes and seconds automatically, and shows the decimal-hour equivalent (4.25 h) alongside.
Timesheets and payroll systems use decimal hours. Divide minutes by 60, or read the common values here:
| Minutes | Decimal hours |
|---|---|
| 5 min | 0.08 h |
| 10 min | 0.17 h |
| 15 min | 0.25 h |
| 20 min | 0.33 h |
| 30 min | 0.50 h |
| 40 min | 0.67 h |
| 45 min | 0.75 h |
| 50 min | 0.83 h |
Example: a 7 h 40 min shift = 7 + 40/60 = 7.67 decimal hours; at $18/hour that's 7.67 × 18 = $138.06.
The elapsed-time mode answers the everyday timesheet question: I started at 8:45 AM and left at 5:15 PM with a 45-minute lunch — how many hours is that? Elapsed time is 8 h 30 min; minus the break it's 7 h 45 min = 7.75 payable hours. For shifts that cross midnight (10:00 PM – 6:30 AM), the calculator adds 24 hours automatically instead of returning a negative number, which is the standard convention on time cards.
Find the exact duration between two times — same day, overnight, or across dates — in hours, minutes, seconds, and decimal hours.
Convert military (24-hour) time to standard AM/PM time and back, with a full 24-hour conversion chart and pronunciation guide.
Weekly work-hours timesheet: enter start, end, and break times for each day to get total hours, decimal hours, and gross pay.