Calculate Business Days Between Two Dates
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.
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.
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. This varies by country — our calculator automatically applies the correct rules for 100+ countries. This is why our business days between dates tool applies the correct public holiday rules automatically based on your selected country.
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.
Frequently Asked Questions
Does the start date count as a business day? Yes. By default the start date is included in the count as the first business day.
What if my start or end date falls on a weekend? The calculator automatically adjusts to the next available business day.
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? Our calculator uses verified public holiday data updated annually. Results are accurate for all standard Monday to Friday work weeks across 100+ countries including the US, UK, Canada, Australia, and South Africa.
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 on the calendar including Saturdays and Sundays. Our business days between dates calculator counts only Monday through Friday, skipping weekends and public holidays. A 30 calendar day deadline and a 30 business day deadline are very different things. Thirty calendar days is one month. Thirty business days is six weeks. Contracts, legal notices, and payment terms often specify which type applies, so always confirm before you start counting.
Public Holidays and Business Day Calculations
Public holidays reduce the number of business days in any given period. A month with two public holidays has two fewer business days than a standard month. This matters for payroll cycles, project timelines, and legal deadlines. Our calculator pulls verified public holiday data for over 100 countries so you get an accurate count without manually checking a holiday calendar. Select your country from the dropdown and the correct holidays are excluded automatically.
Why Manual Counting Fails
Count five weeks on a calendar and you will likely miss a public holiday. Miss one and your deadline shifts by a full day. In legal filings that costs money. In payroll that causes complaints. In project management that breaks client trust. A calculator removes the human error entirely. You enter two dates, select your country, and get the right answer in under a second.
How This Calculator Handles Weekends
Every Saturday and Sunday between your start and end date is automatically excluded. You never need to check which days fall on weekends manually. The calculator loops through every day in your date range and skips any day that is not Monday through Friday. The result is a clean count of genuine working days only.
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.
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. Our 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.