UltimateTools
Time & Date

How to Use the Business Days Calculator

Choose a start date, then either enter a number of business days to add or subtract, or enter a second date to count the business days between the two — the calculator automatically skips weekends in either mode, without requiring any manual weekend-counting.

The Business Days Calculator supports two directions — here's what each one does.

Adding or subtracting business days from a date

Enter a start date and a number of business days, and the calculator returns the resulting date, automatically skipping weekends throughout the count — useful for projecting a deadline or delivery date forward, or checking how far back a required lead time pushes a start date.

Counting business days between two dates

Enter a start and end date, and the calculator returns the number of business days between them, again automatically excluding weekends — useful for checking whether a given span actually satisfies a stated business-day requirement.

Frequently asked questions

Does the calculator account for public holidays?

Check whether the specific tool includes a holiday calendar option — a standard business-day calculation only excludes weekends by default, so holidays typically need separate manual confirmation unless explicitly supported.

Can I use this for a country where the weekend isn't Saturday–Sunday?

If the tool doesn't support alternate weekend configurations, treat the result as based on a standard Saturday–Sunday weekend and adjust manually for regions with a different weekend convention.