Time Duration
Calculate time between two times
Add / Subtract Time
Supported Formats
09:30:009 hours, 30 minutes, 0 seconds (24h)17:4517 hours, 45 minutes (seconds default to 0)00:00:00Midnight / start of day23:59:59One second before midnightCommon Use Cases
- Work shift duration calculation
- Payroll hours (decimal format)
- Event or meeting duration
- Overnight shift crossing midnight
- Adding travel time to a departure time
FAQ
Can I calculate durations longer than 24 hours?
The duration calculator works within a single day. For multi-day durations, use the Date Difference calculator and multiply days by 24 to get hours.
How does the Add/Subtract feature work?
Enter a base time, then specify hours and minutes to add or subtract. The result wraps around the 24-hour clock — for example, adding 3 hours to 23:00 gives 02:00.