Add or subtract durations, find time between clock times and total multiple durations in hours, minutes and seconds.
Processed locallyYour files never leave your device. Result
4 h 23 min 0 s
Decimal hours: 4.3833
Total minutes: 263
Total seconds: 15,780
How it works
- Choose add/subtract, between clock times or multiple durations.
- Enter hours, minutes and seconds; crossings over midnight are detected automatically.
- Review the normalized result, decimal hours, total minutes and total seconds.
Practical example
2 h 35 min + 1 h 48 min = 4 h 23 min. From 22:30 to 06:15, 7 h 45 min elapse.
Formula and explanation
Each duration or clock time is converted to seconds first.
Results can exceed 24 hours or be negative after subtraction and are also shown as total units.
Frequently asked questions
Can I add more than 24 hours?
Yes. Results do not reset after one day.
Can the result be negative?
Yes. A minus sign is shown when subtractions exceed additions.
What are decimal hours?
They express the same duration as hours, for example 1 h 30 min equals 1.5 h.