Date Calculator: Days Between Dates

Count days, weeks, months and working days between two dates, or add time to a date.

This tool runs entirely in your browser — no data is uploaded to our servers.

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How many days until an important deadline? When does a 90-day contract end? How many working days between two dates? This calculator answers in seconds, showing the difference in years, months and days, plus total days, weeks and hours.

In “add or subtract” mode, enter a date and add years, months, weeks or days to get the resulting date and weekday.

How to use it

  1. Choose a mode: difference between dates, or add/subtract time.
  2. Enter the dates or the date and duration.
  3. Pick your weekend to count working days accurately.
  4. Read the detailed result.

Features

  • Difference in years, months, days, plus total days, weeks and hours.
  • Working days with a selectable weekend (Sat–Sun, Fri–Sat…).
  • Add or subtract years, months, weeks and days.
  • Weekday shown for the resulting date.
  • Option to include the end day.

Tip: For contract and legal deadlines, check whether the start or end day counts, and use the “include end day” option when needed.

Privacy

The tool runs in your browser and your data is not sent to our servers. Free, with no sign-up.

Frequently asked questions

Are leap years handled?

Yes, the real calendar is used, so 29 February counts in leap years.

Are public holidays excluded?

No, only weekends are excluded because holidays differ by country. Subtract them manually if needed.

Does it support the Hijri calendar?

This tool uses the Gregorian calendar. Use our Hijri date converter for Hijri dates.

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