Date Difference Calculator
Count the exact days, weeks, months and years between any two dates — or add and subtract days from a date to find deadlines, due dates and anniversaries.
How to use
- Pick a start and end date to see the difference in days, weeks, months and years.
- Or switch to Add/Subtract mode, choose a date and offset in days.
- Weekday of the result is shown so you can plan around weekends.
Frequently asked questions
The difference counts nights between dates (end − start). Add 1 if you want both endpoint days included, e.g. for leave applications.
Yes — calculations use real calendar dates, so February 29 and month lengths are always correct.