Date Calculator

How to use this calculator

1. 1 For the number of days between two dates, pick both dates in the first section. The order does not matter; the distance is shown either way.
2. 2 To find the date a certain number of days from now, use the second section: pick a start date and type how many days to add.
3. 3 Type a negative number, for example -30, to go backwards in time.
4. 4 Deadlines are often counted in calendar days, like a 60-day notice period; this calculator counts every calendar day including weekends.

Frequently asked questions

Are both end dates counted?

The result is the distance between the two dates: from Monday to Friday is 4 days. If your deadline counts both the first and the last day, add 1 to the result.

Can I share a link to a result?

Yes. The dates you pick are written into the address bar, so copying the link keeps them. Use the copy button under the calculator, or bookmark the page once it is filled in. Anyone opening the link sees the same two dates and the same count.

Does it handle leap years?

Yes. The math works on the real calendar, so February 29 and leap years are counted correctly.

Can I calculate weeks or months between dates?

The result is in days; divide by 7 for whole weeks. Months vary in length (28 to 31 days), so a day count is the unambiguous measure.

Does daylight saving time affect the count?

No. Days are counted on calendar dates, not clock hours, so a 23- or 25-hour day still counts as exactly one day.