Business Days Calculator
Count the working days (Monday–Friday) between two dates, plus the number of weekend days in the range.
Why Business Days Matter
In business and legal contexts, deadlines are frequently expressed in working days rather than calendar days. A contract that requires delivery within “10 business days” means something very different from “10 calendar days” — especially when the period spans weekends or a holiday.
Common use cases include: calculating SLA response times, estimating project delivery dates, tracking payroll processing timelines, determining court filing deadlines, and planning shipping and logistics schedules. This calculator gives you the Monday-to-Friday count instantly so you can plan accurately.
Business Days in Common Periods
| Period | Typical Business Days | Weekend Days |
|---|---|---|
| 1 week | 5 | 2 |
| 2 weeks | 10 | 4 |
| 1 month (~4.3 weeks) | ~21–23 | ~8–9 |
| 1 quarter (13 weeks) | ~65 | ~26 |
| 6 months | ~130 | ~52 |
| 1 year | ~261 | ~104 |
Excludes public holidays. Actual counts vary depending on the specific start date.
Frequently Asked Questions
What counts as a business day?
This calculator defines business days as Monday through Friday, excluding weekends (Saturday and Sunday). Public holidays are not excluded because holidays vary by country, region, and employer. If you need to account for specific holidays, subtract them manually from the result.
How is the business day count calculated?
The calculator iterates through each calendar day in the range and counts only the days that fall on Monday–Friday. This is the most accurate method and correctly handles any combination of start and end dates regardless of week boundaries.
Are the start and end dates included in the count?
The calculator counts from the start date up to (but not including) the end date — the same convention used in most SLA and contract calculations. To include both endpoints, add 1 to the result.
What does the weekend days count tell me?
The weekend days count shows how many Saturdays and Sundays fall within the date range. This is useful when you need to communicate the total calendar span alongside the working-day span.
How do I account for public holidays?
This calculator does not have a built-in holiday database because holidays differ by country and organization. To account for them, note the business days result and subtract the number of public holidays that fall in the range on weekdays.