Date & Time
Business Days Calculator
Business days (also called working days) exclude weekends, which matters for estimating delivery times, project timelines, or payment processing windows.
The formula
business days = total weekdays between start date and end date, inclusive
Worked example
From Monday, March 2, 2026 to Friday, March 13, 2026:
10 business days (2 weekend days excluded)
Frequently asked questions
How are business days calculated?
The calculator counts every day between the start and end date, inclusive, and excludes any day that falls on a Saturday or Sunday, leaving only Monday-through-Friday weekdays in the total.
Does this account for public holidays?
No — this calculator only excludes weekends. If your date range includes public holidays, subtract those manually from the result for a more accurate business-day count.
Is the start and end date both included in the count?
Yes — both the start date and end date are included in the count if they fall on a weekday.