Date and time
Time calculator
Add or subtract two durations in hours and minutes.
Your numbers
Both a decimal point and a comma work.
Result
4 h 15 min
Duration
- Total minutes
- 255 min
How it works
T = (h₁ × 60 + m₁) + (h₂ × 60 + m₂)
Using the calculator
Enter «Add»: First duration: hours · First duration: minutes · Second duration: hours · Second duration: minutes. Calculation: T = (h₁ × 60 + m₁) + (h₂ × 60 + m₂).
Enter «Subtract»: First duration: hours · First duration: minutes · Second duration: hours · Second duration: minutes. Calculation: T = (h₁ × 60 + m₁) − (h₂ × 60 + m₂).
Worked input and result
Example (Add): First duration: hours = 3 h; First duration: minutes = 20 min; Second duration: hours = 1 h; Second duration: minutes = 40 min. Result: Total duration = 5 h 0 min (Total minutes: 300 min).
Example (Subtract): First duration: hours = 3 h; First duration: minutes = 20 min; Second duration: hours = 1 h; Second duration: minutes = 40 min. Result: Difference = 1 h 40 min (Total minutes: 100 min).
Understanding the result
One hour is 60 minutes. Enter whole hours and minutes from 0 to 59. Durations can exceed 24 hours.
Arithmetic on hours and minutes is different from finding a wall-clock interval between dates. Use the duration calculator for dated intervals or work-hours for shifts and breaks.