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Time Calculator

Add or subtract hours, minutes and seconds, or add time to a clock time.

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Operation

Enter your values to see the result.

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Clear instructions

Find steps, examples and limitations below.

Use online

Open the tool in a supported web browser.

Free to use

No sign-up required. Tool-specific limits may apply.

How to use the Time Calculator

Add or subtract hours, minutes and seconds, or add time to a clock time.

  1. 1 Choose Add durations or Add to a clock time.
  2. 2 Enter the first duration or start time, then choose add or subtract.
  3. 3 Enter the second duration and read the result.

Example and practical tips

A flight leaving at 9:30 PM that lasts 7 h 45 min lands at 5:15 AM the next day (in the same time zone).

Frequently asked questions

Can the result be negative?

Yes. Subtracting a longer duration gives a negative result.

Does it handle time zones?

No. Use the time zone converter for that.

Report an issue

Something broken or not quite right? Tell us and we will look into it.