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Days between dates calculator

Pick a start date and an end date. You see the calendar days, the same span in weeks and months, and the business days.

Use it for deadlines, due dates, holidays, pregnancies or a countdown.

How it's calculated

Calendar days are every day between the two dates. The start date counts and the end date doesn't, unless you tick the option.
Business days are the Mondays to Fridays in that same span. Public holidays are not taken off.
Leap years count with their 29 February.

An example

From 2 March 2026 to 30 June 2026 there are 120 calendar days.

Of those, 86 fall on Monday to Friday.

Frequently asked questions

Does it count the first day or the last?

By default it counts the first and not the last, as when you subtract two dates. If you need both, tick “Include the end date”.

Do business days leave out public holidays?

No. They count Monday to Friday. Holidays change by country, region and year, so take them off separately.

How many days are in a year?

365, or 366 in leap years. That is why the same two dates in different years can be a different number of days apart.

Key terms

Calendar days: Every day on the calendar, weekends and holidays included.
Business days: In this calculator, Monday to Friday.

The same calculation in other countries

Up-to-date official data

We check the official sources automatically, every day.

See all sources

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