Business days calculator

Count the business days between two dates, or start from a date and find the one that comes N business days later. List your holidays, and choose the weekend for your country.

  • Free
  • No sign-up
  • Runs in your browser
business-days-calculator

Fill in the values above to see the result.

100% private — the calculation is done in your browser and nothing is sent to any server.

Next step

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How it works

Choose what to calculate

Count the days between two dates, or add business days to a date.

List holidays and set the weekend

Optional: one holiday per line. Choose the weekend days used where you are.

Read the result

The number of business days, or the resulting date.

Deadlines are counted in working days

Contracts, deliveries, refunds, legal notices, payment terms and service levels are very often defined in business days: "delivered within 5 business days", "payment due 30 working days after the invoice", "reply within 10 business days". Counting them means skipping weekends and public holidays, which is tedious and easy to get wrong on a calendar. This calculator does it in both directions.

Two modes

  • Count the days between two dates: you get the business days, the weekend days, the holidays skipped and the calendar days in the period. You can choose whether to include the end date.
  • Add business days to a date: enter a start date and a number of days and you get the date on which the period ends. A negative number counts backwards, which is useful to find when something had to start.

Holidays

Public holidays differ by country, region, and even city, so the tool does not assume any. List the ones that apply, one per line or separated by commas, written as 2026-12-25 or as 25/12/2026, and they are skipped, provided they fall on a weekday. A holiday that falls on a weekend is not counted twice. If a date is not understood, the tool tells you which and ignores it.

Not everyone has the same weekend

Most countries take Saturday and Sunday as the weekend, but in several others it is Friday and Saturday, and some businesses work on Saturdays and rest only on Sunday. You can choose among these three, and the count follows.

How the counting works

The start date is not counted when you add days: adding one business day to a Friday gives the next Monday. When you count the days between two dates, the start date is included and the end date is included if you tick the option, which matches how most legal and commercial periods are stated. Always check how the rules that apply to you count, as practice varies.

What it does not do

The tool does not know which holidays exist, half days, bridge days or company closures, so you have to supply them. It counts whole days, not hours. For a simple count of all days, use the date difference calculator.

Frequently asked questions

How do I calculate business days between two dates?
Pick the two dates and the tool counts the weekdays between them. Add your holidays to exclude them.
How do I find the date 10 business days from today?
Choose "The date after a number of business days", set the start date and enter 10. Weekends and listed holidays are skipped.
Which days are the weekend?
By default Saturday and Sunday. You can choose Friday and Saturday, or Sunday only.
How do I enter holidays?
One per line or separated by commas, as 2026-12-25 or 25/12/2026. Only those that fall on a weekday change the result.
Is the start date counted?
When adding days, no: one business day after Friday is Monday. When counting between dates, the start is included, and the end if you tick the option.
Are my dates sent anywhere?
No. The calculation is done in your browser.

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