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Days Between Dates

Calculate the exact duration and count of days between any two dates.

Start Date

End Date

Total Duration
--
Total Days
Weeks & Days --
Full Months --
Percentage of Year --

How to Calculate Days Between Dates

Calculating the duration between two dates is essential for project management, legal deadlines, or simply counting down to a special event. While it seems simple, manual calculation often misses leap years or the inconsistent lengths of months.

Inclusive vs. Exclusive Dates

By default, most duration calculators find the difference between two timestamps (Exclusive). However, if you are calculating a work contract or a school semester, you usually want to include both the first and the last day (Inclusive). Our tool allows you to toggle this with a single click.

Time Unit Breakdown

Knowing that there are 365 days in a year is one thing, but seeing that a project will take exactly **52 weeks and 1 day** provides a much clearer perspective for planning and resource allocation.