HomeDates & time
Time duration calculator
Hours and minutes between a start time and an end time.
Quick answer
Time duration is the gap between two clock times, found by subtracting the start from the end. Formula: Minutes = (end hour ร 60 + end minute) โ (start hour ร 60 + start minute). From 09:30 to 17:45 is 8 hours 15 minutes, or 8.25 hours.
Read the guide: How to calculate time duration and hours worked
Duration
8 hours 15 minutes
- In decimal hours
- 8.25
- In minutes
- 495
How is time duration calculated?
Times are on the 24-hour clock, so 5:45 pm is 17:45.
If the end is earlier than the start, the calculator assumes you worked past midnight.
The decimal hours figure is handy for timesheets and pay: 8 hours 15 minutes is 8.25 hours.
What is the formula for time duration?
- Minutes = (end hour ร 60 + end minute) โ (start hour ร 60 + start minute)
- If that is negative, add 24 ร 60 for a span past midnight; then subtract the break
Can you show a worked example of time duration?
09:30 to 17:45: (17 ร 60 + 45) โ (9 ร 60 + 30) = 1,065 โ 570 = 495 minutes, which is 8 hours 15 minutes or 8.25 hours.
How do minutes convert to decimal hours?
Divide the minutes by 60. Useful for timesheets.
| Minutes | Decimal hours |
|---|---|
| 5 | 0.08 |
| 10 | 0.17 |
| 15 | 0.25 |
| 20 | 0.33 |
| 30 | 0.50 |
| 45 | 0.75 |
| 50 | 0.83 |
Common questions
How do I enter pm times?
Add 12 to the hour: 3 pm is 15, 11 pm is 23. Midnight is 0.
Does it handle night shifts?
Yes. A 22:00 to 06:00 shift is 8 hours.
How do I convert minutes to decimal hours?
Divide by 60. 15 minutes is 0.25 hours.
Can it span more than one day?
No, it covers up to 24 hours. Use the date difference calculator for longer gaps.