Date Difference Calculator

Find the exact time between two dates, in days, weeks, months and years.

Comparison uses calendar dates and is not affected by time zone.
Difference
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Enter both dates
In weeks—
In months (approx)—
In years (approx)—

How it works

We calculate the exact number of days between the two calendar dates, then express it in weeks (÷7), approximate months (÷30.44) and approximate years (÷365.25).

Example

From January 1 to June 15 in the same non-leap year is 165 days — about 23.6 weeks or 5.4 months.

Assumptions & limitations

Month and year conversions are approximate since calendar months and years vary in length; the day count itself is always exact.

Frequently asked questions

Is the day count exact?

Yes, the day figure is exact. Only the week/month/year conversions are approximations for readability.