Business Days Calculator
Free utility

Business Days Calculator

Count working days between two dates. Skip weekends, exclude public holidays for 35+ countries, and copy a clear summary in one second.

Try:
Business days
22
Calendar days
30
Weekend days excluded
8

There are 22 business days between January 1, 1970 and January 31, 1970 (end date excluded), excluding 8 weekend days.

What a business days calculator does

A business days calculator counts the working days between two dates while skipping weekends, and optionally public holidays. Most teams use it when a simple calendar-day count would be misleading, for example when payment terms say "net 30 business days" or a contract gives you ten working days to respond.

This tool runs entirely in your browser. Nothing is sent to a server, results are instant, and the math is the same logic finance, HR, and legal teams use every day.

How business days are calculated

For each day in the range, the calculator checks two things: is it a weekend, and is it a public holiday in the selected country. Days that pass both checks count as business days. Calendar days are simply the total number of days between the two dates, with the end date included or excluded based on your choice.

  • Monday to Friday work week treats Saturday and Sunday as non-working.
  • Monday to Saturday work week treats only Sunday as non-working.
  • Holidays falling on a weekend are not double-counted.
  • The end date is excluded by default, matching standard contract language.

Common use cases

  • Project deadlines. Convert a "ten working day" milestone into a real calendar date.
  • Payment terms. Find the exact due date for net 15, net 30, or net 60 business day invoices.
  • Service level agreements. Verify response and resolution times stated in working days.
  • HR and PTO. Count working days off without including weekends in the leave balance.
  • Legal notice periods. Calculate response windows that exclude weekends and public holidays.
  • Shipping ETAs. Estimate delivery dates when carriers quote business days only.

Weekends and public holidays

Weekends are handled by the work week setting. Public holidays cover 35+ countries including the United States, United Kingdom, France, Germany, Spain, Switzerland, Italy, Canada, Australia, Japan and many more. Mobile feasts (Easter, Lunar New Year, Eid) and observed shifts when a holiday falls on a weekend are computed automatically, with accurate coverage from 1970 to 2099. Regional or bank-specific observances (state, canton, school) are not included, since these vary widely. If you need precise handling for a particular region or industry, double-check the result against your local calendar.

Worked examples

Example
January 2026, Monday to Friday, no holidays

From January 1, 2026 to January 31, 2026 with the end date included, there are 31 calendar days, 9 weekend days, and 22 business days.

Example
Same range, US holidays excluded

The same January 2026 range with United States holidays excluded removes New Year's Day and Martin Luther King Jr. Day, leaving 20 business days.

Example
Net 30 business days, UK

An invoice issued on March 2, 2026 with a 30 working day term, Monday to Friday, with UK bank holidays excluded, is due on April 17, 2026.

Frequently asked questions

Are Saturdays counted as business days?

Only when you choose the Monday to Saturday work week. By default the calculator follows a Monday to Friday week, which is the most common standard worldwide.

How are public holidays handled?

When holiday exclusion is on, the tool checks each day in the range against a built-in list of national holidays for the country you select. Holidays that fall on a weekend are already excluded as weekend days, so they are never counted twice.

Should I include the end date?

It depends on the contract. Many legal and finance contexts treat the end date as exclusive. If the rule is 'response within 10 business days from receipt', the day of receipt is usually day zero. Use the toggle in More options to match your case.

Does the calculator work across years?

Yes. You can pick any start and end date and the result will span months and years correctly. To keep the page fast, the maximum supported range is 50 years.

Why does my number differ from another calculator?

Two reasons usually explain a small difference: whether the end date is included, and which holidays are counted. Check both settings before assuming an error.

Are local or regional holidays supported?

Not yet. Only national public holidays are included for the listed countries. State, provincial, or industry-specific holidays should be checked separately.

Is the calculation accurate?

Yes. The math is deterministic and runs in your browser. There are no rounding tricks or estimates, just a day-by-day count that respects your settings.