Days Between Dates Calculator
Pick a start date and an end date to count exactly how many days are between them.
Your calculation is performed in your browser.How it works
The calculator subtracts the start date from the end date to get an exact day count. An inclusive/exclusive toggle lets you choose whether both end dates are counted.
Formula & methodology
Exclusive days = end date − start date (neither endpoint double-counted). Inclusive days = exclusive days + 1 (both the start and end date counted).
Worked example
From March 1 to March 10 is 9 days (exclusive) or 10 days (inclusive, counting both March 1 and March 10).
Important notes
- —Use "inclusive" when you want to count both the first and last day, such as counting days of a vacation.
- —Use "exclusive" when you want the pure gap between two dates, such as days remaining before a deadline.