Working Days Calculator
Count the number of working (business) days between two dates, excluding weekends and any holidays you specify.
Saturdays and Sundays are treated as non-working. Enter a holiday count to exclude public holidays.
What Is a Working Days Calculator
A Working Days Calculator counts the number of working, or business, days between two dates. Unlike a plain date count, it ignores weekends and any holidays you specify, so the result reflects the days people actually work.
This matters because most plans run on business days, not calendar days. A delivery promised in ten working days, a notice period, a payroll cycle or a project timeline all skip Saturdays, Sundays and public holidays. Counting these by hand is slow and error prone, especially across long ranges that span several months.
How It Works
The tool steps through every date in your chosen range and applies a simple set of rules:
- Count each day that falls Monday through Friday as a working day.
- Skip Saturdays and Sundays as weekend days.
- Subtract any holidays you add to the list, so a public holiday on a weekday is not counted.
- Both the start and end dates are usually included in the count.
The result is the total number of working days, and the tool also shows how many weekend days were excluded so you can sanity check the figure. If your office works a six-day week, you can adjust which days count as weekends.
Worked Example
Take the month of January 2026, from 1 January to 31 January. The month has 31 calendar days. Of these, 9 fall on a weekend (the Saturdays and Sundays in the month), leaving 22 working days. If you then mark Republic Day, 26 January, which falls on a weekday, as a holiday, the working day total drops to 21. This is exactly how you would size a payroll month or a project sprint.
Where It Helps Most
Project managers use working days to set realistic delivery dates and to see how holidays push a deadline. HR and payroll teams count working days for salary proration, leave balances, and notice periods, where a resignation served over a fixed number of working days lands on a different calendar date than a simple day count would suggest.
Finance and operations teams rely on it for settlement windows and service level agreements quoted in business days. Even individuals find it useful when a bank or service promises action within a set number of working days, letting them know the true date to expect a result. By stripping out non-working days, the calculator turns vague promises into firm dates.
Frequently Asked Questions
A working day is any day from Monday to Friday that is not marked as a holiday. Saturdays, Sundays and the holidays you add are excluded from the count.
Yes, by default both the start date and the end date are counted if they fall on working days. This matches how most notice periods and delivery windows are measured.
Yes. Add the dates of any public or company holidays and the tool subtracts those that fall on weekdays, giving you an accurate working day total for your region.
You can adjust which days are treated as the weekend. If you follow a six-day week, set only Sunday as a non-working day and the count will reflect that.
Most months have between 20 and 23 working days, depending on how the weekends fall and any holidays. January 2026, for example, has 22 working days before holidays.
A date countdown counts every calendar day, including weekends and holidays. This tool counts only business days, which is what payroll, projects and notice periods usually require.