How the business days calculator works
This calculator counts every calendar day from your start date to your end date, including both endpoints. It then removes the days you don't work: Saturdays, Sundays, and any public holiday that falls on a weekday. What's left is your net business days — the figure used for delivery estimates, SLAs, payment terms and project deadlines.
What counts as a holiday?
The tool connects to Nager.Date to fetch official public holidays for 110+ countries. A holiday only reduces your business-day count when it lands on a weekday — holidays that fall on a weekend are already excluded as weekend days.
Common uses
- Estimating shipping and delivery windows
- Calculating invoice due dates and net payment terms
- Planning project timelines and sprint deadlines
- Working out notice periods and contractual deadlines
Frequently asked questions
Does the calculator include the start and end date?
Yes — the count is inclusive of both the start and end date. If you pick the same day for both, and it's a weekday with no holiday, the result is one business day.
Which weekend days are excluded?
Saturdays and Sundays are treated as non-working days. The tool assumes a standard Monday–Friday work week.
Which countries are supported?
Over 110 countries via Nager.Date. Select your country from the dropdown and the correct national holidays are applied automatically.
Is my data sent anywhere?
Your dates stay in your browser. The only external request is to Nager.Date to fetch the public holiday list for the selected country and year.