CalculatorTime Calculator
Hours between two times
Enter a start time and an end time. You get the length in hours and minutes, in decimal hours and in minutes. If the end time is earlier than the start time, it is treated as the next day, so a shift from 22:00 to 06:00 is 8 hours.
Add or subtract time
Enter a time and how many hours and minutes to add. 22:30 plus 2 h 30 min is 01:00 the next day. Enter negative numbers to go back: 01:00 plus −1 h −30 min is 23:30 the previous day.
Decimal hours
Some forms and logs ask for hours as a decimal, such as 7.5 instead of 7 h 30 min. Divide the minutes by 60:
| Hours and minutes | Decimal hours |
|---|---|
| 15 min | 0.25 |
| 30 min | 0.5 |
| 45 min | 0.75 |
| 8 h 20 min | 8.33 |
Example: studying from 9:00 to 18:30 is 9 h 30 min = 9.5 hours. Take away a 1-hour lunch break and that is 8.5 hours of study.
FAQ
Can I use AM and PM?
The time boxes follow your device's clock setting, so they show AM/PM or 24-hour time automatically.
Is a break subtracted?
No. Subtract it from the result yourself: 9 h 30 min minus a 1-hour break is 8 h 30 min.
Related guide
- Time Calculation Guide: Hours, Minutes, DifferencesFind the time difference across midnight, convert minutes to decimal hours, add hours and minutes, and plan trips or study sessions without mistakes.
- Decimal Hours, Minutes and the 12/24-Hour ClockConvert 1.75 hours to 1 h 45 min and back, turn seconds into minutes, switch between 12-hour and 24-hour times, and add up several durations.