Count the working days (Mon–Fri) between two dates.
Calculated locally in your browser.
How do you calculate business days between two dates?
Every day from the start to end date (inclusive) is counted, Saturdays and Sundays are excluded, then any holiday count is subtracted. Both start and end dates are included, matching most working-day calculations. For example, June 2026 has 30 calendar days and 22 weekdays; subtracting 2 holidays leaves 20 working days.
Understanding your result
Both the start and end dates are included in the count, matching how most working-day calculations are done.
Formula and method
Every day from start to end (inclusive) is counted; Saturdays and Sundays are excluded, then the holiday count is subtracted.
Assumptions and limitations
The count assumes a standard Monday-to-Friday working week and treats every Saturday and Sunday as non-working. Public holidays are only excluded if you enter them yourself, since holiday dates differ by country and region. Part-day working, shift patterns and regional weekends are not modelled.
Worked example
June 2026 has 30 calendar days and 22 weekdays; subtracting 2 holidays leaves 20 working days.
How to use this tool
- Choose a start and end date.
- Optionally enter the number of public holidays.
- Read the working-day total.
Common mistakes to avoid
- Forgetting to add public holidays, which are not detected automatically.
About the Business Days Calculator
Count how many working days fall between two dates, excluding weekends and any holidays you specify.
Who should use this tool
Project managers, HR and anyone planning deadlines or leave.
Benefits
- Counts only Monday-to-Friday working days between two dates.
- Includes both the start and end dates, matching common practice.
- Lets you subtract your own holidays for an accurate local total.
- Runs privately in your browser with no data sent anywhere.
Practical use cases
- Estimating a delivery or turnaround date in working days.
- Planning a project timeline that skips weekends.
- Calculating notice or payment periods stated in business days.
- Working out how many working days remain until a deadline.
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Frequently asked questions
Are both dates included?
Yes. The count is inclusive of the start and end dates.
Does it know public holidays?
No — holidays vary by country, so enter the number to subtract yourself.
How do I account for public holidays?
Enter each holiday date that falls on a weekday within your range, and the tool subtracts it from the working-day total. Because official holidays vary by country and region, they are not applied automatically, which lets you tailor the count to your own calendar.