How does the Business Days Calculator work?

Iterate through each calendar day between the two dates Then: Skip days where getDay() returns 0 (Sunday) or 6 (Saturday) Then: Count remaining days as business days Then: For public holidays, subtract manually.

Can you give an example of how to use the Business Days Calculator?

Example: Input Monday to Friday same week gives a result of 5 business days.

Is the Business Days Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Business Days Calculator?

Our Business Days Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Business Days Calculator

Start Date

End Date

A business days calculator counts working days between two dates, excluding weekends (Saturday and Sunday). Used for project timelines, delivery estimates, payment terms, and legal deadlines.

Symbol	Name	Unit	Description
start	Start date	date	Beginning date
end	End date	date	Ending date
business_days	Business days	days	Excludes weekends and holidays

Calendar Days	Approx Business Days	Notes
7	5	1 week
14	10	2 weeks
21	15	3 weeks
30	22	1 month approx
60	43	2 months approx
90	65	1 quarter approx

References

›Business day conventions — ISO 8601

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Business Days Calculator

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Business Days Calculator