Business Days Calculator

How Business Days Calculator Works

The calculator walks through every calendar day between your two dates and counts only those that fall on a Monday through Friday, skipping Saturdays and Sundays — both the start and end date are included in the count if they themselves fall on a weekday.

Who Uses Business Days Calculator and Why

• Estimating a shipping or delivery window quoted in business days rather than calendar days.
• Working out a project deadline or contract term measured in weekdays only.
• Checking payment terms like "net 10 business days" against a specific invoice date.
• Confirming how many working days fall within a given date range for staffing or scheduling purposes.

Mistakes to Avoid

• Assuming the count already excludes public holidays — it only skips Saturdays and Sundays, so holidays need to be subtracted manually since they vary by country and industry.
• Forgetting both the start and end date are included in the count if they themselves fall on a weekday — a range starting and ending on a weekday counts both endpoints.
• Using this tool when a raw calendar-day count (including weekends) is actually what's needed — the day counter is the right tool for that instead.

Tips for Best Results

• For a deadline that also needs to account for holidays, subtract known holiday dates from the business-day total manually after calculating.
• Remember weekday counting includes both endpoints, so a range that starts and ends on the same weekday-adjacent pair (like Friday to Monday) counts fewer days than the raw calendar gap suggests.

Fixing Common Problems

The business day count doesn't match what my shipping carrier quoted. — Carriers typically also exclude public holidays, which this calculator doesn't account for — subtract any holidays that fall within your date range manually.

Terms Explained

Business day: Any weekday, Monday through Friday, as counted by this tool — regardless of whether it's a public holiday.