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Date Difference Calculator

Compare dates in total days, business days and calendar-aware units.

Dates are calculated locally.

Loading the local tool workspace…

What Date Difference Calculator does

Calculate elapsed time with optional end-date inclusion, weekend handling, custom excluded dates and clear direction across reversed dates and leap years.

Privacy and processing

Dates are calculated locally. Entered values remain in the current page session and are not included in analytics or monitoring.

How to use Date Difference Calculator

  1. 1Choose a start and end date.
  2. 2Decide whether to include the labelled end date, exclude weekends and add custom excluded dates.
  3. 3Review calendar-aware results, direction and business days or swap the dates.

Common uses

  • Planning a project interval
  • Counting weekdays around known holidays
  • Finding an age-like calendar duration

Limitations

  • Public holidays are not known automatically; add relevant excluded dates yourself.
  • Dates use calendar days rather than elapsed hours across time zones.

Frequently asked questions

Are leap years handled?

Yes. Calculations use real calendar dates, including February 29 where valid.

What happens when dates are reversed?

The tool reports Before, After or Same date, and calculates the absolute interval; you can also swap them.

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