What is the Date Difference Calculator?
Count the days, weeks, months and years between two dates.
Enter start date and end date and the Date Difference Calculator returns difference, total days, weeks and days, total months, total hours and working days (Sunday to Thursday). Results update as you type, and nothing you enter leaves your device.
How it is calculated
Days = end date − start date
Years, months and days are counted calendar-wise
How to use it
- Enter start date.
- Enter end date.
- Read difference in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Date Difference Calculator use?
It uses: Days = end date − start date; Years, months and days are counted calendar-wise.
What do I need to use the Date Difference Calculator?
You need start date and end date. Sensible starting values are filled in so you can see how it works straight away.
Is the Date Difference Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.