Time math

Time between clock readings

Calculate the hours and minutes between two clock times, including overnight periods.

Inputs

Result

8:30:00

510 minutes · fixed clock arithmetic

How to use time between clock readings

Find how long a shift, class, or activity lasts from its start and end clock readings. Select Next day when the end belongs to the following day.

Worked example

09:00 to 17:30 is 8 hours 30 minutes. 22:00 to 06:00 on the next day is 8 hours.

What the result means

This is clock arithmetic over at most 24 hours. Use the time-zone converter for real instants across a daylight-saving transition.

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Read the calculation conventions →