Date Difference Calculator
Find out exactly how much time separates two dates, in days, weeks, months, and years.
Counting the days between dates
This tool computes the absolute difference between two calendar dates and expresses it several ways. Days are exact; months and years are shown as approximations (using average month and year lengths) because calendar months vary in length.
Common uses
Track how long until a deadline, how many days you have owned something, the length of a trip, or the gap between two milestones. Enter the dates in either order — the result is always positive.
Frequently asked questions
Are months and years exact?
Days are exact. Months and years are approximations based on average lengths (30.44 days and 365.25 days), since real months differ in length.