How are months counted?

The calculator counts full calendar months. Partial months are expressed as remaining days to give an exact breakdown.

Does it handle leap years?

Yes. The day calculation uses the actual millisecond difference between timestamps, which accounts for all calendar rules including leap years.

Yes. You can use any valid dates - past, future, or historical.

Calculate the exact number of days, weeks, months, and years between two dates. Runs instantly in your browser.

1
Enter a start date
Pick the first date from the date input.
2
Enter an end date
Pick the second date. Today's date is pre-filled.
3
Read the difference
See the gap in total days, weeks, and the breakdown by years, months, and days.

How are months counted?: The calculator counts full calendar months. Partial months are expressed as remaining days to give an exact breakdown.
Does it handle leap years?: Yes. The day calculation uses the actual millisecond difference between timestamps, which accounts for all calendar rules including leap years.
Can I calculate past and future dates?: Yes. You can use any valid dates - past, future, or historical.

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