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Date & time

Time duration calculator

Calculate a duration from start and end times. An earlier end time is treated as occurring on the following day.

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01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Duration = end time − start time − break; add one day if the end time is earlier.

Worked example

08:30 to 17:00 is 8 hours 30 minutes. After a 30-minute break, 8 hours remain.

Things to check

  • Equal start and end times give zero hours. Use the time duration converter for a full 24-hour interval. Employment-law break requirements are not assessed.