Business Days Calculator
Count business days between two dates, excluding Saturdays and Sundays.
Result
- Workdays
- 0
How it works
Choose a start date and an end date. The result is the number of weekdays in the range.
When this question comes up
Delivery estimates, payment terms and service-level agreements are usually written in business days rather than calendar days. A supplier promising five business days is not promising five days: across a weekend that is closer to a week. It is also the number you need when planning leave, because annual leave is normally deducted in working days.
Rules and limits
- Saturdays and Sundays are excluded. Public holidays are not removed — this version counts weekdays only.
- The start date is not counted and the end date is, so Monday → Tuesday returns 1.
- If the range is a single day that falls on a weekend, the result is 0.
- The earlier date is used as the start automatically, so the result is never negative.
Worked example
Mon 5 Jan 2026 → Fri 9 Jan 2026 = 4 business days
Checking the result by hand
Count whole weeks first, then add the leftover weekdays. Monday to the following Monday is five business days, because the second Monday counts and the first does not. For a longer range, divide the calendar days by seven, multiply by five, then correct for the leftover days and for any public holidays that fall inside the range.
FAQ
Are public holidays excluded?
Not yet. Only weekends are removed. Holiday calendars differ by country, so they are planned as a later addition.
Is the start date counted?
No. The range is counted from the day after the start date up to and including the end date.
Keep reading
- How to Count the Days Between Two DatesThe arithmetic is simple, but the ambiguity is not. How to count calendar days, when to include the end date, and where leap years actually change the answer.
- Business Days, Weekends and Public HolidaysWhy five business days is not five days, how to count working days by hand, and why public holidays make cross-border deadlines harder than they look.
- Deadlines, Notice Periods and Date ArithmeticHow to count a notice period backwards, what “one month” means in a contract, how month-end and leap days break naive arithmetic, and how to record a deadline defensibly.