Time Calculator
Enter two durations and choose add or subtract to get the combined time in hours, minutes and seconds.
Duration 1
Duration 2
Result
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Total seconds
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About this time calculator
Sometimes you need to add up several durations or find the gap between two — like total video length, combined task times or lap times. This calculator adds or subtracts two durations and gives a clean h:m:s result plus the total number of seconds.
Frequently asked questions
What can I do with this?
Add up durations (like lap times or task times) or find the difference between two durations. The result is shown as h:m:s and as total seconds.
Can the result be negative?
If you subtract a larger duration from a smaller one, the result is shown as a negative duration.
Is it private?
Yes — everything is calculated in your browser.
Related tools
Try the Hours Calculator or Age Calculator.