Thunder Tools

Business Days Calculator

Pick a start and end date and this calculator counts the business days between them, including both endpoints when they fall on a weekday, along with the total number of calendar days and weekend days in the range.

Start date
End date
Business days --

How it works

The calculator counts every Monday through Friday between your start and end dates, including both dates themselves if they fall on a weekday. Saturdays and Sundays are excluded.

Tip

Handy for estimating delivery times, project deadlines, or payment terms that are quoted in business days rather than calendar days.

Does this include public holidays?

No — only Saturdays and Sundays are excluded. Public holidays vary by country and region, so they aren't automatically factored into the count; subtract any holidays that fall within your date range yourself.

More tools in this category

More categories

Thunder Tools is a small, ad-light collection of browser tools and calculators, built to be fast, free, and useful without getting in your way.

© 2026 Thunder Tools by Muted Thunder · All rights reserved.