How it works
Walks day-by-day from the start date to the end date (inclusive), skipping whichever weekday(s) you mark as weekend, and skipping any date in the selected country's public-holiday list.
Business Days Calculator
Count business days between two dates with a custom weekend.
Interactive calculator
This calculator becomes interactive when JavaScript is available. The page still provides its method, limits and related tools without JavaScript.
Result classification
Mathematically exact. The result uses deterministic calendar or arithmetic rules on the values you enter. Dates are normalized before calculation, and invalid inputs are rejected.
Limitations
Exact for the stated rule and valid inputs; it does not decide legal, medical, contractual or policy questions.
Frequently asked questions
Where do the public holidays come from?
The dates come from the Nager.Date public-holiday service. If it cannot be reached because the device is offline or the request is blocked, the calculator falls back to weekend-only counting and displays a notice.
Can I use a Friday–Saturday weekend?
Yes. Select any days in the weekend picker; the calculator is not limited to Saturday and Sunday.
Practical guide
Reviewed 27 July 2026How to use the Business Days Calculator
- Enter the known values.Use the date, time, place or duration requested above.
- Check the assumptions.Confirm time zone, weekend, inclusion and rounding choices when shown.
- Read and reuse the result.Copy, share or continue to a related tool without retyping unnecessary information.
Common uses
The Business Days Calculator is useful for deadlines, payroll planning, service levels and delivery estimates.
Edge cases to check
Pay particular attention to local weekends, regional holidays, observed holidays and emergency closures.