Business Days Calculator
Count weekdays between two dates, excluding Saturdays and Sundays. Useful for estimating workdays and planning deadlines; holidays are not removed.
Calculate Business Days
How the Calculation Works
How It Works: The calculator counts weekdays (Monday-Friday) between the selected start and end dates, including both selected dates when they fall on weekdays. Saturdays and Sundays are excluded; public holidays are not automatically excluded.
A 14-day span containing two full weekends usually has 10 weekdays. Check local holidays separately when estimating a work deadline.
Worked Example
Example: From Tuesday, September 1, 2026 to Friday, September 18, 2026, counting both dates:
- Calendar Days: 18 days
- Business Days: 14 weekdays
- Weekend Days: 4 days (two Saturdays and two Sundays)
The calculator counts weekdays in the range, but does not remove public holidays.
How to Use This Calculator
Why Business Days Matter: Project timelines, delivery estimates, and deadline calculations typically refer to business days, not calendar days. A "10-business-day delivery" means 10 working days, which could span 14 calendar days if weekends are included.
Holiday Considerations: This calculator does not exclude public holidays. When estimating a deadline, check relevant holidays separately; they can add non-working days to the calendar duration.
Global Time Zones: Business days vary by country/region. Some countries have different weekend days or additional holidays. This calculator typically uses Monday-Friday as business days.
Frequently Asked Questions
What are business days?
Business days are Monday through Friday (weekdays), excluding weekends (Saturday and Sunday). They represent working days in most offices and businesses.
How many business days are in a month?
A typical month has about 20-22 business days, depending on how many weekends fall within the month. September 2026 has 22 business days.
Does this calculator exclude public holidays?
No. It excludes Saturdays and Sundays only. Check your local holiday calendar separately when estimating working time.
How do I calculate business days between two dates?
Use this calculator. Enter your start and end dates, and it will show calendar days, business days, and weekends separately.
Why is this important for deadlines?
When someone says a project is due in "10 business days," they mean 10 working days, not 10 calendar days. The actual calendar duration is longer because weekends aren't counted.