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Date Difference Calculator

Calculate the difference between two dates in days, weeks, months and years. Instant and in the browser.

Live·100% in your browser — no upload

What is Date Difference Calculator

The Date Difference Calculator works out how much time passes between two dates, showing the result in days, weeks, months and years. Handy for deadlines, anniversaries, project durations or quick counts.

The calculation happens in the browser, with nothing sent.

How it works

  1. Choose the start date.
  2. Choose the end date.
  3. The four counts update automatically.
  4. Swap the dates if you like: the result is always absolute.

Frequently Asked Questions

Are months and years exact?
Days and weeks are exact to the day. Months and years are calendar-based (difference in months/years), useful as a readable estimate.
Does it count the end day too?
The difference is the number of days between the two dates; if you need both endpoints included, add 1 to the days result.
Are the dates sent online?
No. The calculation is entirely local.

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