Business Days Calculator
Weekdays between dates (excludes weekends only).
Enter your values in the interactive calculator to see an instant result. Calculations run in your browser, without an account.
Results are estimates for educational use; confirm important decisions with appropriate experts.
Formula • Worked example • Interpretation
Weekday counts between dates
Business days often means Monday through Friday, excluding Saturdays and Sundays. Public holidays can reduce the count further.
Calculation method
Worked example
Monday October 5 through Friday October 9, 2026 contains five weekdays if both dates are included.
What your result means
The number of business days is not the same as elapsed calendar days, and organizations may have different holiday schedules.
Tips for better calculations
When planning a deadline, add your holiday exclusions manually and check the agency or employer’s cutoff rules.
Assumptions and limitations
This tool excludes weekends only; it does not automatically subtract federal, regional, school or company holidays. Confirm whether the endpoints are included.
SiCalcs tools provide estimates and educational calculations; they do not replace professional financial, medical, tax, or legal advice.