How to Find the Number of Days Between Two Dates
Finding the number of days between two calendar dates is useful for project planning, deadlines, travel, subscriptions, age-related calculations, and many other tasks.
What does “date difference” mean?
Date difference is the elapsed time between a start date and an end date. The result can be expressed in days and then converted into approximate weeks or months.
Why manual calculation can be difficult
Months do not all contain the same number of days, and leap years add an extra day. A date calculator can account for these calendar differences automatically.
Example
If an event starts on March 1 and ends on March 11 of the same year, the elapsed difference is 10 days when counting the time between the two dates.
Use the online calculator
Open the free Date Difference Calculator, choose a start date and an end date, and calculate the difference instantly.
Important counting detail
There is a difference between elapsed days and inclusive counting. If you count both the starting and ending calendar dates as full included days, your total will be one higher than the elapsed difference.
Frequently asked questions
Does the calculator handle leap years?
Yes. Date calculations use actual calendar dates, so leap-year days are included where applicable.
Can I use it for future dates?
Yes. You can compare dates in the past, present, or future.