What if my start or end date falls on a weekend?

The calculator does not shift your input dates. It simply excludes weekend dates from the count automatically, so the result only reflects genuine working days within your range.

Can I exclude public holidays?

Yes. Select your country from the dropdown to automatically exclude all public holidays for that country.

How accurate is the business days between dates calculator?

This calculator uses verified public holiday data updated annually. Results are accurate for standard Monday to Friday work weeks across 100+ countries including the US, UK, Canada, Australia, and South Africa.

Does this calculator use inclusive or exclusive counting?

It uses inclusive counting by default, both the start and end date count if they fall on business days. Check your contract or legal notice, since some specify exclusive counting instead.

Business Days Between Dates: Free Calculator for 100+ Countries

Calculate Business Days Between Two Dates

Start Date

End Date

Country (for public holidays)

Use our free business days between dates calculator to count the exact number of working days between any two dates. Excludes weekends and supports public holidays for 100+ countries.

Counting working days manually takes time and invites mistakes. A missed public holiday or miscounted weekend throws off deadlines, payroll dates, and legal filings. Using a business days between dates calculator removes that risk entirely. Enter two dates, select your country, and get an accurate working days count in seconds.

Calendar with pins marking dates used to calculate business days between dates

How to Calculate Business Days Between Dates

Enter your start date and end date in the fields above. Select your country to exclude public holidays. Click Calculate to see the exact number of business days between your chosen dates. This business days between dates calculation works the same way regardless of how far apart your two dates are.

Inclusive or Exclusive, Check Your Contract First

Some contracts count both the start and end date. Others count only the days strictly between them. This calculator uses inclusive counting by default, both dates count if they fall on a business day. If your contract or legal notice specifies otherwise, adjust your input dates accordingly before relying on the result.

What Counts as a Business Day?

A business day is any weekday that is not a public holiday. In most countries this means Monday through Friday. Saturdays, Sundays, and nationally recognised public holidays are excluded from business day counts.

Holidays Vary by Country

This calculator applies the correct public holiday rules automatically based on your selected country, covering over 100 countries. A date that counts as a business day in one country may be a public holiday in another.

Does the Start Date Count as a Business Day?

By default, this calculator includes the start date in the count, provided it falls on a business day. If your start date falls on a weekend or public holiday, it is not counted, since it is not a business day to begin with. The count simply begins from the first valid business day in your range.

What Happens if Your Start or End Date Falls on a Weekend

The calculator does not move your input date. It calculates the count using only the business days that exist within your chosen range, skipping weekend and holiday dates automatically. If your start date is a Saturday, the count begins on the following Monday if that day qualifies as a business day.

Common Uses for a Between-Dates Calculator

The business days between dates calculator is used by project managers tracking milestone deadlines, HR teams calculating contract and notice periods, legal professionals counting court filing windows, accountants managing invoice and payment terms, and small business owners planning delivery and shipping schedules. Whatever the use case, the business days between dates result only matters if the underlying count is accurate.

How Long is 10, 30, or 90 Business Days?

Ten business days is two calendar weeks, assuming no public holidays fall in that window. Thirty business days is roughly six calendar weeks. Ninety business days covers about eighteen calendar weeks, just over four months. These are estimates. Public holidays in your country shift the actual end date, which is why a calculator beats manual counting every time.

Business Days vs Calendar Days

Calendar days count every day, including weekends. This calculator counts only Monday through Friday, skipping weekends and public holidays. A 30-calendar-day deadline is one month, while a 30-business-day deadline is about six weeks. Confirm which type your contract or legal notice specifies before you calculate business days between dates.

Read the full business days vs calendar days comparison for contract terms, shipping windows, and legal deadline examples.

Calculating Business Days Across Month Boundaries

Counting business days that cross from one month into the next trips people up. February has fewer days than March. A public holiday in one month does not affect the count in the next. This calculator handles month boundaries automatically. Enter January 15 and March 15 and it counts every valid working day across both months without any manual adjustment from you.

Crossing Year Boundaries

The same logic applies across a year end. Public holidays differ from year to year in some countries, so the calculator checks the correct holiday calendar for each year your date range spans, not just the year of your start date.

Industries That Rely on Business Day Calculations

Law firms calculate filing deadlines and response windows in business days. Banks process transfers and clear payments on business days only. Construction contracts specify notice periods and completion dates in working days. HR departments count probation periods, notice periods, and contract lengths in business days. Logistics companies calculate estimated delivery dates by adding business days to dispatch dates. Getting the count wrong in any of these industries carries real consequences. Each of these industries depends on an accurate business days between dates result to avoid costly timing mistakes.

FREQUENTLY ASKED QUESTIONS

Question	Answer
Does the start date count as a business day?	Yes, if it falls on a weekday that is not a public holiday. If your start date falls on a weekend or holiday, it is not counted, since it is not a business day.
What if my start or end date falls on a weekend?	The calculator does not shift your input dates. It simply excludes weekend dates from the count automatically, so the result only reflects genuine working days within your range.
Can I exclude public holidays?	Yes. Select your country from the dropdown to automatically exclude all public holidays for that country.
How accurate is the business days between dates calculator?	This calculator uses verified public holiday data updated annually. Results are accurate for standard Monday to Friday work weeks across 100+ countries including the US, UK, Canada, Australia, and South Africa.
Does this calculator use inclusive or exclusive counting?	It uses inclusive counting by default, both the start and end date count if they fall on business days. Check your contract or legal notice, since some specify exclusive counting instead.

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Last updated: July 2026.