DocomintBusiness Days Calculator
Count the number of weekdays (business days) between two dates, excluding weekends.
What is a Business Days Calculator?
Counts only Monday-through-Friday days between two dates — useful for estimating shipping windows, project timelines, or a work-days-remaining count, since a flat calendar-day count overstates actual working time by roughly 2 out of every 7 days. Doesn't account for public holidays, which vary by country and calendar.
How to use the Business Days Calculator
- Enter a start date and end date
- Press Calculate
- The number of business days and weekend days between them appear instantly, computed on your device
Formula
Business Days = Total Days − Weekend Days (Saturdays and Sundays)
Every day in the range is checked individually; Saturdays and Sundays are excluded from the business-day count, everything else is included.
Example
August 2026 (Aug 1–31) contains 21 business days and 10 weekend days across its 31 total days — a useful sanity check before promising a delivery "within 15 business days" that spans a full calendar month.
Common mistakes
- Assuming the result already excludes public holidays — it doesn't; only weekends are removed, since holiday calendars vary too much by country to build in.
- Forgetting both the start and end date are counted if they land on a weekday, not just the days strictly between them.
- Using this for a region where the weekend isn't Saturday/Sunday — the tool assumes the Saturday/Sunday weekend convention.
Frequently asked questions
Does this account for public holidays?
No — it counts Monday through Friday as business days regardless of holidays, since holiday calendars vary significantly by country, region, and organization. Subtract known holidays from the result manually for your specific context.
How are the start and end dates themselves counted?
Both the start date and end date are included in the count if they fall on a weekday — so a Monday-to-Friday range counts as 5 business days, not 4.
What if my country's weekend isn't Saturday and Sunday?
This tool assumes the common Saturday/Sunday weekend convention. In regions with a different weekend (e.g. Friday/Saturday in some countries), manually adjust the result by the number of those specific weekdays that fall in your date range.
How do I subtract public holidays manually?
Count how many public holidays fall on weekdays within your date range (using your local holiday calendar) and subtract that number from this tool's business-day result for a more accurate working-day count.
Is my numbers uploaded anywhere?
No — Business Days Calculator runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.