Work & Time

Working time calculator

Net working time from start, end and break - with a weekly and monthly view.

Updated on Apr 21, 2026 Calculator, calculation path and examples on one page

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Calculator

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Calculation path

Step by step

  1. Determine gross duration

    Formula: End - start

    Result: 08:45 hours

  2. Take a break

    Formula: Duration − break

    Values inserted: 08:45 hours − 45 minutes

    Result: 08:00 hours

  3. Extrapolate to the week

    Formula: Time of day × working days

    Values inserted: 08:00 hours × 5

    Result: 40:00 hours

Instructions

How to use this calculator correctly

How to use the calculator

  • Enter start time, end time and break.
  • Optionally adjust the number of working days per week.

Common mistakes

  • Specify a break in hours instead of minutes.
  • Confusing weekly working hours with monthly values.

Limits of the calculation

  • The monthly value is an average value, not a calendar calculation.

Related guide: Working time, hours and industrial minutes in everyday life

Examples

Typical calculations

08:30 to 17:15 with 45 minutes break.

Office day

daily working hours: 08:00 hours

Load this example

07:00 to 13:00 with 15 minutes break.

Short day

daily working hours: 05:45 hours

Load this example

14:00 to 22:30 with 30 minutes break.

Late shift

daily working hours: 08:00 hours

Load this example

FAQ

Frequently asked questions

Can the calculator calculate beyond midnight?

Yes. If the end time is before the start time, midnight is automatically calculated.

Is it compulsory to enter the break?

Only if you want to take them into account. Without a break the value remains 0.

Why does the calculator also show the time of the month?

As a quick guide, the time per week is extrapolated to an average month by a factor of 4.333.

Is the calculator suitable for shift work?

Yes, especially for individual services or standard shifts.

Are public holidays included?

No, this calculator only looks at the typical daily and weekly rhythm.

Related calculators

Continue seamlessly

Hour calculator

Add or subtract multiple time blocks and display them as the total duration.

Sources and notes

Rule status and context

Formula
Working time = end time − start time − break