Time Calculator
Add or subtract two hour-and-minute durations to plan shifts, travel, study, or projects.
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Your result
Enter your details to calculate.
Worked example
Sample inputs
- First duration — hours
- 2
- First duration — minutes
- 45
- Second duration — hours
- 1
- Second duration — minutes
- 30
- Operation
- Add durations
Combined duration: 4 hr 15 min
- First duration: 2 hr 45 min
- Second duration: 1 hr 30 min
How this time calculator works
Each duration is converted to minutes, combined according to the selected operation, then converted back to hours and minutes. Results can exceed 24 hours.
Frequently asked questions
Can a time total be more than 24 hours?
Yes. The result is a duration, not a time of day, so totals such as 27 hours remain intact.
What happens if subtraction would be negative?
The calculator reports the magnitude and indicates that the result is below zero.