Business Days and Working Days Calculator
Counts Monday-to-Friday days between two dates.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
business days = weekdays from start to end − public holidays
Weekdays are counted from the date’s position in the week, five for each whole week, so any length of range is exact.
What to watch out for
Enter only holidays that fall on a weekday in the period. One that lands on a Saturday or Sunday is already left out, unless your employer moves it to a weekday. If your working week is not Monday to Friday, this count does not apply.
Frequently Asked Questions
How many working days are in a month?
Usually 20 to 23 before holidays. March 2025 has 21 weekdays and February 2025 has 20.
Are the start and end dates counted?
Yes in the headline figure, which is how a working period usually reads: Monday to Friday of one week is 5 business days. For a “within so many days” count, use the figure that leaves out the start date.
Is a business day the same as a weekday?
A weekday is any Monday to Friday. A business day is a weekday that is not a public holiday, which is why holidays are subtracted.