Time Calculator

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Add or subtract two amounts of time in days, hours, minutes and seconds.

How the calculation works

Enter two durations and choose to add or subtract. The result is shown in days, hours, minutes and seconds, and also as total hours, minutes and seconds.

Formula used

Total seconds = days × 86,400 + hours × 3,600 + minutes × 60 + seconds

Example

5 h 45 m plus 3 h 30 m 15 s is 9 hours, 15 minutes and 15 seconds.

Frequently asked questions

Can I get a negative result?

Yes. A negative sign means the second time is larger.

How do I find the time between two clock times?

Use the Hours Calculator.

Results are estimates for general information only and are not professional financial, medical or legal advice.