Business Days Calculator

The business days calculator is a tool that helps you determine the number of working days (business days) between two given dates, excluding weekends (Saturday, Sunday, or both) and public holidays. Most countries have Business days from Monday to Friday, which may vary depending on local customs and specific organizations.

Formula and logic explanation

The formula for calculating working days includes key calculations that ensure accuracy by accounting for weekends and holidays. Mathematically, it can be expressed as:

Business Days = Total Days − Weekends − Holidays

Total Days: Total days represent the total number of calendar days between the start and end dates, including the starting and ending dates.

Weekends: Weekends refer to the non-working days that occur within the date range, typically Saturdays and Sundays in most regions. These weekends are excluded from the count because they are not considered the standard workweek.

Example 1:
Start Date: January 1, 2024
End Date: January 10, 2024
Business Days = 10 − 2 = 8 days
Final result: 8 Business Days

Example 2:
Start Date: December 20, 2023
End Date: January 5, 2024
Business Days = 17 − 6 − 2 = 9 days
Final result: 9 Business Days

Holidays: Holidays represent public holidays that are considered as non-working days. These are specific dates designated by the federal government. This calculator subtracts these holidays from the total count, ensuring only actual working days are included in the final result.

Month Total Days Weeks & Extra Days Holidays Business Days

Table 1 provides a monthly breakdown for 2025, displaying the total Month, Total Days, Weeks & Extra Days, Holidays, and Business Days.

How to use this calculator

using this calculator is straightforward, but understanding the steps can help ensure accurate results. Below is the full explanation of how to use this calculator;

Step 1: The first step is to input the start and end dates of the period you want to calculate. This calculator uses the DD/MM/YYYY format. Always double-check your input to avoid errors. 

Step 2: If the calculation needs accounting for public holidays, choose them from the list of options to exclude them. This calculator updates all of the federal holidays authorized by the United States.

Step 3: This calculator automatically removes weekends (Saturdays and Sundays) from calculations; however, if your country or region does not follow the standard Saturday-Sunday timetable, you can exclude Saturday or Sunday from the list.

Step 4: Once your inputs are confirmed, click the calculate button to initiate the calculation. It will display the total number of business days between two dates.

Quarter Total Days Business Days Holidays Weekend Days

Table 2 shows total days, business days, holidays, and weekends for each quarter of 2025.

1. What days are business days?

Business days are Monday through Friday , excluding public holidays. In certain regions or industries, Saturday may be considered a partial or full business day.

This depends on the country, industry, and specific company policies, Saturday is generally not counted as a business day.

The first day of the week is Monday internationally (per ISO standards) or Sunday in many Western cultures.