Time Duration Calculator

Calculate elapsed hours and minutes between two clock times.

Enter your values

Change any field. The result is recalculated on this device.

Your result

Local calculation
Duration8h 30m 0s
Total minutes
510

How this calculation works

Calculate elapsed hours and minutes between two clock times. The result is calculated locally in your browser from the visible inputs, and the method below remains available for checking.

Duration = end clock seconds − start clock seconds, optionally adding 24 hours when crossing midnight.

Worked example

09:00 to 17:30 is 8 hours 30 minutes.

Assumptions and limits

  • Inputs use the units shown beside each field.
  • Intermediate values retain precision; displayed values are rounded for readability.

Questions people ask

How does the Time Duration Calculator work?

It applies this displayed method: Duration = end clock seconds − start clock seconds, optionally adding 24 hours when crossing midnight. Values stay in your browser and are not submitted to a server.

What should I check before using the Time duration result?

Inputs use the units shown beside each field. Intermediate values retain precision; displayed values are rounded for readability. Calendar and time-zone results use browser date and IANA timezone data; legal deadlines may follow jurisdiction-specific rules.

Does this Time duration calculator save my information?

No. Calculation inputs are processed on this device. Sharing creates a URL only when you choose the share action.

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