Date Difference Calculator
Calculate how many days, weeks, months and years lie between any two dates.
How to use
Pick two dates; result updates instantly.
Formula
Calendar difference; accounts for month lengths and leap years.
Examples
- 2026-01-01 to 2026-12-31 → 364 days
Important notes
Uses Gregorian calendar.
Frequently asked questions
Does it include leap years?
Yes, full calendar arithmetic.