Days Between Dates

Count the days between two dates, including how many are weekdays and weekends.

What is the Days Between Dates?

This tool gives the exact number of days separating two dates.

How does it work?

Dates are compared at midnight UTC to avoid daylight-saving errors. Weekdays and weekend days are counted day by day.

Formula

Days = (End − Start) ÷ 86,400,000 ms

Example

There are 365 days between 1 January 2026 and 1 January 2027, of which 261 are weekdays.

Frequently asked questions

Why might this differ by one from another calculator?

Some tools include both the start and end date. Toggle “Include the end date” to match.

Related tools

Enable JavaScript to use this calculator.