Business Days Calculator
Business Days Calculator counts weekdays in a date range using Monday through Friday as working days. It is suitable for a quick weekday estimate, but it does not know national holidays, company closures, half-days, local weekends, or contractual inclusion rules.
Runs locally — files stay on your deviceDoes a business-day count automatically exclude public holidays?
No. This tool excludes weekends only; holidays require a location- and policy-specific calendar.
Weekdays are only a simplified business calendar
The calculation identifies Saturday and Sunday as non-business days and counts Monday through Friday across the range. A real business calendar may have additional closures or different weekend days.
How it works
Select the start and end dates. The tool walks through the calendar range and counts dates whose weekday is Monday through Friday.
Key concepts
Holiday awareness is absent
A weekday public holiday still looks like a business day to the calculator.
Range inclusion matters
Policies can include or exclude start and end dates differently.
When to use it
- Estimate weekday capacity.
- Check a simple Monday-to-Friday interval.
- Get a baseline before applying holidays.
When not to use it
- Do not use the raw result for regulated deadlines without a holiday calendar.
- Do not assume Saturday and Sunday are weekends everywhere.
- Do not infer working hours or staffing levels.
Worked examples
Standard workweek
- Input
Monday through Friday- Expected output
Weekdays are counted
No weekend falls inside the interval.
Weekend crossing
- Input
Friday through Monday- Expected output
Saturday and Sunday excluded
Only weekday dates contribute.
Weekday holiday
- Input
A public holiday on Tuesday- Expected output
Tuesday still counted
The tool has no holiday dataset.
Common mistakes
Calling weekdays true business days
Public holidays and closures can reduce availability. Correction: Apply the correct regional calendar.
Ignoring endpoint rules
Deadline policies differ on whether receipt and due dates count. Correction: Confirm the inclusive convention.
Assuming universal weekends
Workweeks differ across regions and organizations. Correction: Use a calendar configured for the actual context.
Best practices
- Treat the result as a weekday baseline.
- Subtract verified closures separately.
- Document endpoint and local-weekend rules.
Related operations and differences
Add Days to Date
Choose Add Days to Date when you need to find a future date after adding days.; use Business Days Calculator specifically for business days.
Add Months to Date
Choose Add Months to Date when you need to add calendar months using local browser time.; use Business Days Calculator specifically for business days.
Add Weeks to Date
Choose Add Weeks to Date when you need to add a number of weeks to a date.; use Business Days Calculator specifically for business days.
Age Calculator
Choose Age Calculator when you need to calculate age in completed years.; use Business Days Calculator specifically for business days.
Date Difference Calculator
Choose Date Difference Calculator when you need to count calendar days between two dates.; use Business Days Calculator specifically for business days.
Date to Unix Timestamp
Choose Date to Unix Timestamp when you need to convert a date and time to Unix seconds.; use Business Days Calculator specifically for business days.
Limitations and privacy
- No public holidays or custom closures.
- Weekend is fixed to Saturday and Sunday.
- No business hours, timezones, or service-level cutoffs.
Dates and calculations stay in this browser and are not uploaded.
Frequently asked questions
Are public holidays excluded?
No.
Which days count as business days?
Monday through Friday.
Does it count working hours?
No.
Can weekend rules be customized?
Not in this tool.