Business Days Calculator
Pick two dates. Weekends and public holidays are subtracted for you.
Custom holidays
Add a company or local holiday that isn't in the preset. Weekends and duplicates are ignored.
US, UK and Korea public holidays cover 2025–2027 only. Add custom holidays for other years or countries.
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What's the difference between business days, working days and calendar days?
Calendar days count every day, including weekends and holidays. Business days (also called working days) count only the days most offices are open, so this business days calculator subtracts weekends and public holidays from the total to show the number of actual working days between your two dates. Use calendar days for age or countdowns, and business days for deadlines, SLAs, payroll and delivery estimates.
Which public holidays does the working days calculator exclude?
Pick a country preset and it removes the official days off: United States federal holidays, United Kingdom (England & Wales) bank holidays, or South Korea statutory holidays including substitute days. The built-in holiday data covers 2025 to 2027. For any other year or country, or a company day off, open Custom holidays and add the dates yourself — they are merged with the preset and never double-counted with weekends.
Are the start and end dates counted?
By default both the start and end date are included, which is what most contracts and SLAs mean by "within N business days". Turn off "Include start date" or "Include end date" if your rule counts from the day after or stops the day before. The breakdown always splits the total into business, weekend and public-holiday days so you can check the math.
Can I change the weekend from Saturday–Sunday?
Yes. The default weekend is Saturday and Sunday, but you can switch to Friday–Saturday for regions such as much of the Middle East. The same weekend setting applies to counting days between dates and to adding or subtracting business days.
How do I add business days to a date to find a due date?
Switch to the "Add or subtract days" tab, pick a start date, enter a number of business days and choose After to get a due date or Before to work back to a start date. Weekends and the selected holidays are skipped automatically, which is handy for shipping ETAs, payment terms and SLA deadlines. Everything runs in your browser, so your dates never leave your device.