Tiny Toolkit

Business Days Calculator

Count the number of working days (Monday–Friday) between two dates, or calculate what date falls a given number of business days from a start date. Switch between 'days between' and 'add business days' modes using the toggle. Ideal for contract deadlines, SLA windows, and delivery estimates.

All processing happens in your browser. No data is sent to any server.

Frequently Asked Questions

What counts as a business day?
Any weekday (Monday through Friday). The tool does not exclude public holidays by default; it counts all non-weekend days.
What does the 'Add Business Days' mode do?
It calculates the calendar date that falls a given number of business days after (or before, with a negative number) a start date. Useful for contract deadlines and SLA calculations.
Are public holidays accounted for?
Not currently. Holiday rules vary significantly by country and region. The tool counts Mon–Fri only. You can manually subtract the holidays that fall in your date range.

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