Business Days Calculator

How to Use the Business Days Calculator

The Eqsy Business Days Calculator helps you count working days, calculate future or past dates, and plan deadlines while taking weekends and public holidays into account.

Choose the calculator that matches what you need:

Between Dates

Use Between Dates when you want to know how many business days there are between two dates.

1. Choose your country or holiday calendar.
2. Select the days that make up your normal working week.
3. Enter your start and end dates.
4. Choose whether the start and end dates should be included.
5. Click Calculate Business Days.

The result shows the number of calendar days, business days, non-working days, public holidays affecting the calculation, and total working hours.

You can also open Calendar Details to see the calculated period visually.

Add or Subtract Business Days

Need to know the date 10, 30, or 90 working days from now?

Open Add / Subtract Days, choose a starting date, and enter the number of business days. Select Add to calculate a future date or Subtract to calculate an earlier date.

You can also choose whether counting starts on the selected date or on the next business day.

Quick buttons are available for common periods such as 5, 10, 15, 20, 30, 60, and 90 business days.

Deadline Calculator

Use the Deadline Calculator when you have a deadline expressed in business days.

Enter the starting date and the number of business days available. The calculator skips non-working days and applicable public holidays to determine the deadline.

The same section also includes a Payment Terms calculator for common invoice terms such as Net 15, Net 30, Net 45, Net 60, and Net 90.

Payment terms are calculated using calendar days, so weekends and public holidays are not automatically skipped.

What Are Business Days?

A business day is generally a day on which businesses and organizations normally operate. For a standard Monday-to-Friday schedule, Saturday and Sunday are considered non-working days.

Public holidays can also affect the number of available business days. This means that five calendar days do not always equal five business days.

For example, if a period contains a weekend and a public holiday, seven calendar days may contain only four business days.

There is no single working-week pattern that applies everywhere. Some businesses operate six or seven days per week, and working schedules can vary between countries and organizations.

That is why this calculator lets you choose your own working week instead of assuming that every user works Monday through Friday.

Calculate Business Days With Public Holidays

Public holidays are one of the main reasons that manually counting business days can become complicated.

Choose a country from the Country / Holiday Calendar menu and the calculator will use the available public holiday calendar when calculating your result.

When a public holiday falls on a normal working day, it can be excluded from the business-day count. Holidays that already fall on one of your selected non-working days do not reduce the count again.

The result also shows which public holidays occur within the selected period, making it easier to understand how the final number was calculated.

Create Your Own Working Schedule

Not everyone works Monday through Friday.

The Working Week setting lets you select exactly which days should count as business days. This can be useful for shift schedules, retail businesses, six-day working weeks, or organizations with unusual operating days.

You can also change Hours per Workday when you want the calculator to estimate the total number of working hours in a period.

Add Custom Holidays and Non-Working Days

Company closures, vacation days and local events may not appear in a national public holiday calendar.

Use Add custom holidays to exclude your own dates from the calculation.

This can be useful for:

• Company shutdowns or office closures
• Local holidays
• Planned vacation days
• Industry-specific non-working days
• Other dates when your organization is closed

Business Days vs. Calendar Days

The difference between business days and calendar days is important when calculating deadlines.

Calendar days include every day on the calendar: weekdays, weekends and holidays.

Business days include only the days defined as working days, with applicable holidays and custom non-working dates excluded.

For example, 10 calendar days from a Monday is simply 10 days later. But 10 business days may take approximately two weeks to pass when weekends are excluded, and longer if public holidays occur during the period.

Always check whether a contract, invoice, regulation or deadline specifically refers to calendar days or business days before making a calculation.

Common Uses for a Business Days Calculator

A working-day calculator can be useful whenever a date or duration depends on actual working days rather than ordinary calendar days.

Project deadlines: Calculate a delivery date based on a specific number of working days.

Shipping and lead times: Estimate dates when weekends and holidays do not count toward processing time.

Contracts and administration: Calculate periods expressed specifically in business days.

Invoices and payment terms: Quickly find Net 15, Net 30, Net 45, Net 60 or Net 90 payment dates.

HR and scheduling: Count available working days within a particular period.

Personal planning: Calculate working days until an appointment, deadline, trip or other important date.

🔹 Related time tools on Eqsy

If you need more time-based calculations, you may also find these tools useful:

• Age Calculator – calculate your exact age in years, months, and days

• Date Difference Calculator – find the number of days, weeks, or months between two dates

• Color Flow Clock – visualize time as a flowing color gradient

• Planning across different countries? Use our [Time Zone Converter] to compare local times between cities around the world.

You’ll find all of them in the Time category on Eqsy.