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Days Between Dates
About the Days Between Dates
Count the number of days between any two dates. Useful for countdowns, trip planning, contracts, notice periods and anniversaries.
How to use the Days Between Dates
- Enter the Start Date and the End Date.
- Press Calculate to see the days, weeks and months between them.
Formula and method
The number of days is the difference between the two calendar dates, counted in whole days, taking leap years into account.
Worked example
From 1 January 2026 to 1 March 2026 there are 31 + 28 = 59 days. From 25 December 2026 to 1 January 2027 there are 7 days.
When to use the Days Between Dates
- Counting the days between two dates for contracts, travel and projects.
- Working out how many days you have left until a deadline.
- Finding the length of a stay or a period of employment.
Common mistakes to avoid
- Forgetting whether the end date should be counted as well.
- Confusing calendar days with working days.
Tips
- Decide whether the end date is included. Use the Day Counter if you need to include it.
- The result changes by one day across a leap day (29 February).
Frequently Asked Questions
No. The calculator counts the days that pass between the two dates, so a start date of today and an end date of tomorrow is 1 day.
Yes. It counts every calendar day. Use the Business Days calculator for working days.
Yes. Leap days are counted correctly.