What this Business Days Calculator does

This business days calculator helps you count working days between two dates. It usually excludes Saturdays and Sundays, and it can also exclude holidays if you choose to add them. That makes it more useful than a regular date counter when your timeline depends on actual workdays.

People use business day calculations for shipping deadlines, contract periods, payroll schedules, project planning, and service-level agreements. It is one of the most practical time and date tools for professional use.

Why it is useful

Calendar days and business days are not the same. If a task takes 10 business days, weekends do not count, so the result is later than a simple date difference.

How to calculate business days

Enter the start date and end date, then count only the working days between them. If the calculator supports holidays, you can also remove those dates from the count.

Step 1: Enter the dates

Set the beginning date and the ending date for your timeline.

Step 2: Choose weekend and holiday rules

Most calculators treat Saturday and Sunday as the weekend, but some allow custom weekend rules.

Step 3: Read the result

The calculator returns the number of business days, and in some cases it can also add a given number of business days to a start date.

Formula

Business days: Calendar days – weekends – holidays

Future work date: Start date + required business days, skipping non-working days

Example calculation

Example: Count business days from Monday to the following Friday.

If there are no holidays in between, the total is 5 business days.

Example: Add 10 business days to a Monday start date.

The result will usually fall on the Friday of the next week, depending on holidays.

Common uses of Business Days Calculator

Project deadlines and delivery estimates.
Payroll and work schedule planning.
Contract and notice period tracking.
Service-level and turnaround-time calculations.

Important tips

If your timeline includes official holidays, add them to the calculation or the result may show more business days than actually available.

Frequently asked questions

How do I calculate business days between two dates?

Count the weekdays between the dates and subtract any holidays that fall on working days.

Does this calculator exclude weekends?

Yes. Business days calculators usually exclude Saturday and Sunday by default.

Can I include holidays in the calculation?

Yes. A good business days calculator lets you subtract holidays as well as weekends.

How long is 10 business days from today?

It depends on weekends and holidays, but it is usually about two calendar weeks later.

Can I add business days to a start date?

Yes. Many calculators can calculate the future date after a given number of workdays.