How to Calculate the Number of Days Between Two Dates

Step-by-step

1. Enter the earlier date as the start and the later date as the end.
2. Run the Date Calculator and read the difference.
3. Decide whether your use needs the end date included. Add one day if it does.
4. For weeks, divide the days by seven. For months, remember that month lengths vary, so a day count is more exact.
5. Check any result that crosses a leap day or a daylight saving change.

A worked example

From 2 November 2026 to 25 December 2026 is 53 days when you count the days between the two dates without including the start. Count both ends and you get 54.

Leap years

A leap year adds 29 February every four years, with the century exceptions. Date tools handle this, but if you calculate by hand, check whether the range crosses 29 February.

Time zones and clock times

When you compare dates with times, a daylight saving change can make a day 23 or 25 hours long. For whole dates, compare the dates in the same time zone.