Time Duration Calculator
Enter a start time and an end time to see exactly how much time passed.
Notes
- Identical start and end times give 0h 00m, not 24 hours.
- 11:45 PM to 12:15 AM returns 30 minutes, because only the minutes actually elapsed are counted.
Common questions
- How do you calculate hours between two times that cross midnight?
- The calculator handles it for you. From 10:00 PM to 6:00 AM it counts 8 hours instead of returning a negative result.
- Why do I need decimal hours?
- Most payroll systems bill in decimal hours rather than hours and minutes. 8h 30m becomes 8.5, and 8h 20m becomes 8.33 after rounding to two places.