Count the days between two dates.

Pick the start and end date, choose whether both dates count, then copy the exact difference.

1 Pick dates2 Choose counting3 Copy difference

Start dateEnd date

Count both the start and end date

Difference

30 days

4 weeks + 2 days

30 days between 2026-09-08 and 2026-10-08.

What next?

Finish the next little job.

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Worth knowing

Inclusive counting changes the answer by one day.

For deadlines, stays and project windows, people often mean different things by ‘between’. Turn on inclusive counting when both the start date and end date should be counted.

Before you use it

This uses calendar dates, not hours.

The calculator treats each selected date as a day on the calendar, so daylight-saving clock changes do not quietly add or remove an hour from the result.

The annoying bit

You can see the dates. Counting every square on the calendar is the ridiculous part.

Trips, deadlines and project windows usually need one boring number: how many days is that, actually?

Got another annoying job?

What’s the annoying thing you need done?

We’ll probably have a monkey for it. If we don’t yet, tell us what keeps wasting your time.