Date difference
Date difference calculator online: work out how many days are between two dates, plus weeks and full years, months and days. How much time has passed or will pass — just pick two dates.
Total days
0
Weeks / days
0 / 0
Years / mo / days
0 / 0 / 0
How to use it
Pick the start date
The date to count from.
Pick the end date
The date to count to. Order doesn't matter — the result is always positive.
See the result
The difference is shown in days, weeks and broken into years, months and days.
Why it's useful
Counting the days between dates comes up all the time: length of service, age in days, the duration of a project or holiday, time left until an event. It's hard to do in your head — months have different lengths and leap years get in the way.
This tool handles the calendar automatically and shows the difference in several formats at once: total days, full weeks, and a breakdown into years, months and days. Just pick two dates.
FAQ
Yes. The calculation follows the calendar, so leap years and varying month lengths are handled automatically.