Date Calculator – Calculate Days

How the Date Calculator Works

The date calculator offers two modes: In the first mode, you add or subtract a duration (days, weeks, months, years) to a start date and get the target date. In the second mode, you enter two dates and the calculator determines the exact difference in days, weeks, months, and years. Optionally, workdays can be calculated (accounting for holidays), which is especially useful for deadline and project planning.

Frequently Asked Questions

How do I calculate the number of days between two dates?

In the 'Calculate duration' mode, simply enter the start and end date. The calculator instantly shows the exact number of days, weeks, months, and years.

What are workdays and how are they calculated?

Workdays are all days except Saturday, Sunday, and public holidays. The calculator supports selectable holiday rules (e.g., nationwide or state-specific holidays in Germany).

Can I add months or years to a date?

Yes, in the 'Calculate date' mode you can add or subtract days, weeks, months, or years to any start date. The result is displayed immediately.

Which holidays are taken into account?

You can choose from various holiday rules, including nationwide German holidays and state-specific regulations. Holidays are automatically excluded from workday calculations.

Is the date calculator free?

Yes, the date calculator is completely free and requires no registration. All calculations are performed directly in the browser without any server connection.