Date Difference Calculator
Find the exact gap between any two dates — with or without the end date.
How to use the Date Difference Calculator
- Pick a start date and an end date.
- Optionally include the end date in the total.
- Click Calculate to see years/months/days plus totals.
Examples & tips
Example: 1 Jan 2025 to 31 Mar 2025 → 2 months, 30 days (90 total days, 65 weekdays).
Frequently asked questions
Does the tool include the end date by default?
No — the default is exclusive of the end date. Tick “Include end date” to add one day.
Are leap years counted?
Yes. Calculations use the actual calendar between the two dates, so February 29 is included correctly.
Can I calculate past or future gaps?
Yes. Any pair of valid dates is accepted, in either order.