Date Difference Calculator
Calculate the number of days, weeks, or months between any two dates — or count down to a future date like a deadline, holiday, or event.
How it works
- Enter the start date and end date.
- The tool shows the difference in years, months, weeks, and days.
- Toggle 'exclude weekends' to count only working days between the two dates.
Frequently asked questions
Does the count include both the start and end date?
By convention this counts the elapsed time between the two dates rather than an inclusive day count — check the result against your specific use case if that distinction matters.
Can I calculate a date in the past as well as the future?
Yes — enter any two dates in either order to get the difference between them, or a single future date to see a countdown.