Time Calculator
Use the Time Calculator to add or subtract days, hours, minutes and seconds. The result is automatically normalized into an easy-to-read duration.
Add or subtract time
How to use the Time Calculator
- Enter the first duration using days, hours, minutes and seconds.
- Choose whether you want to add or subtract the second duration.
- Enter the second duration and calculate the result.
- The calculator converts both values to seconds, performs the calculation and converts the answer back into days, hours, minutes and seconds.
Examples
Adding time
2 hours 45 minutes plus 1 hour 30 minutes equals 4 hours 15 minutes.
Adding across a day
20 hours plus 8 hours equals 1 day and 4 hours.
Subtracting time
5 hours 30 minutes minus 2 hours 15 minutes equals 3 hours 15 minutes.
Frequently asked questions
Can I add more than 24 hours?
Yes. Hours greater than 24 are converted into days and remaining hours automatically.
Can I subtract minutes and seconds?
Yes. Days, hours, minutes and seconds can all be included in the subtraction.
What happens if the subtraction gives a negative result?
The result is shown as a negative duration while preserving the normalized days, hours, minutes and seconds.
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