Business Days Calculator

Business days, also called working days, are the days on which most offices, banks and courts operate: Monday to Friday, minus public holidays. Many deadlines are written in business days rather than calendar days, such as “payment within 10 business days” or “delivery in 3 to 5 working days”. Counting them by hand means checking every weekend and remembering every holiday in between.

This calculator does that count for you. It walks through each date in your range, sets aside Saturdays and Sundays, removes any holidays you have typed in, and shows the working days that remain. It also reports the total calendar days and weekend days, so you can see exactly how the number was reached.

1. Enter the first date of the period as the start date.
2. Enter the last date of the period as the end date.
3. Optionally list holidays that apply to you, one per line, in the format YYYY-MM-DD.
4. Press “Count Business Days”.

Both the start and end dates are included. If your deadline rule starts counting on the day after an event, set the start date to that next day.

A leap day can add a working day. February 2028 runs from Tuesday 1 to Tuesday 29 February and contains 21 business days, while February 2027, with 28 days, contains 20. The calculator reads month lengths from the real calendar, so these differences are handled automatically.

For plain calendar spans, try Date Difference, or move a date forward with Add or Subtract Days.

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