Business Days Calculator
Pick a start and end date and this calculator counts the business days between them, meaning Mondays through Fridays, alongside the total calendar days. Business day counts drive delivery estimates, legal and contractual deadlines, payroll processing, and settlement dates in banking.
The count excludes the start date and includes the end date, matching how most deadlines work: an order shipped Monday with 3 business day delivery arrives Thursday. Public holidays are not subtracted, because they differ by country and region, so treat the result as an upper bound in a week containing a holiday.
How it's calculated
Business days = calendar days − Saturdays − Sundays (holidays not deducted)
The calculator walks the calendar from the day after the start date through the end date and counts days whose weekday is Monday through Friday. Full weeks always contribute exactly 5 business days.
Worked example
From Friday 4 September 2026 to Friday 18 September 2026 is 14 calendar days but 10 business days: two full working weeks with both weekends excluded. A 10 business day review period starting 4 September therefore ends 18 September.
Frequently asked questions
›Does the count include the start or end date?
This calculator excludes the start date and includes the end date, the most common convention for deadlines. If your contract counts the first day too, add one when the start date is a weekday.
›Are public holidays excluded?
No. Holiday calendars vary by country, state, and even industry, so this count covers weekends only. Subtract any holidays that fall on a weekday within your range.
›How many business days are in a year?
A 365-day year has 260 or 261 weekdays, depending on where the weekends fall. After subtracting typical public holidays, most countries end up with roughly 250 working days.
›What does 3 to 5 business days actually mean for delivery?
Count forward skipping weekends, starting the day after shipment. Something shipped on Thursday with 3 business day delivery arrives Tuesday, since Saturday and Sunday do not count.
Related tools
Days Between Dates Calculator
Count the exact number of days between two dates, including or excluding the end date, with the result also shown in weeks, months, and years.
Add or Subtract Days from a Date
Add or subtract days, weeks, or months from any date to find the resulting calendar date. Ideal for deadlines, notice periods, and due dates.
Time Duration Calculator
Calculate the hours and minutes between two clock times, including overnight shifts, with the result also shown as decimal hours for timesheets.