Free Date Difference Calculator
Pick two dates to see the difference in years, months, weeks, and total days.
1 year, 6 months, 15 days
between the two dates
561
Total days
80
Full weeks
1
Extra days
How to use / FAQ
Choose a start and end date and the difference appears instantly — as a natural years-months-days breakdown, plus totals in days and whole weeks. The order doesn't matter; if the end date is earlier, the tool still shows the gap and notes that it's reversed.
How is the years/months/days breakdown calculated?
It counts whole calendar months from the start date without overshooting the end date, then the leftover days — so month lengths and leap years are respected (Jan 31 to Mar 1 is 1 month, 1 day).
Are both dates included in the count?
The result is the span between the two dates. Two identical dates give zero; consecutive days give one day.
Can I count only working days?
Not yet — the totals cover every calendar day, including weekends and holidays. As a rough estimate, multiply the whole-weeks figure by five for business days.
Does time zone affect the result?
No — dates are compared at UTC midnight, so the count is stable no matter where you are.