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Date Difference Calculator

Count the days between two dates, including weeks, business days (Mon–Fri) and the difference in years, months and days.

Runs in your browser Free · No sign-up

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How to use the Date Difference Calculator

  1. Choose a start and an end date.
  2. Tick “Include end date” if both days should count.
  3. Read the total days, weeks and business days.

About this tool

How many days until a deadline, a vacation or a contract end? Pick two dates to get the exact difference, optionally including the end date, plus the number of working days.

  • Private: your data is processed on your device and never uploaded.
  • Free with no account, limits or watermarks.
  • Fast: results appear instantly, even offline once the page has loaded.

Frequently asked questions

Are public holidays excluded from business days?

No. Business days count Monday to Friday only. Public holidays differ by country and region, so subtract them yourself if needed.

Should I include the end date?

Include it when both the first and the last day count, for example for a hotel stay or a vacation from Monday to Friday.