Business Days Calculator
Count the working days between two dates, with weekends automatically excluded — useful for delivery estimates, notice periods and project timelines.
Counts Monday–Friday only, inclusive of both the start and end date. Public holidays are not excluded — see the note below.
How to Use the Business Days Calculator
- 1Enter a start date and an end date using the date pickers.
- 2The calculator instantly shows the total calendar days between them.
- 3Weekend days (Saturdays and Sundays) are automatically counted and excluded.
- 4The remaining figure is your business (working) day count, Monday through Friday.
- 5Remember: no public-holiday calendar is applied — see the limitation noted below.
What Counts as a Business Day Here
A “business day” in this calculator is simply any Monday through Friday. Both the start date and end date are included in the count. The calculator first finds the total number of calendar days spanning the range, then works out how many of those days fall on a Saturday or Sunday, and subtracts them to get the business-day total.
Worked example: from Wednesday, January 3 to Wednesday, January 10 (inclusive) is 8 calendar days. Two of those days — Saturday the 6th and Sunday the 7th — are weekend days. That leaves 6 business days: Wed, Thu, Fri, Mon, Tue, Wed.
Important limitation: this calculator does notapply any public-holiday calendar. National, regional or company-specific holidays (e.g. New Year's Day, Christmas, Independence Day) are not excluded — every Monday through Friday is counted as a working day regardless of whether it's a holiday. If your use case depends on excluding specific holidays, subtract those days manually from the result.
This tool complements the Date Calculator, which gives you the raw calendar difference between two dates without separating out weekends.
Frequently Asked Questions
Formula and figures on this page were checked against official sources as of August 2026. See our editorial process. This tool is for informational purposes only and isn't financial, tax or medical advice.