Business Days Calculator

Count working days between two dates

Enter a start date and an end date to see how many weekdays (Monday through Friday) fall within that range. Toggle the "Include both endpoints" checkbox to switch between an inclusive count (both the start and end dates are counted if they fall on a weekday) and an exclusive count (only the days strictly between the two dates). The tool also shows the total calendar days and the number of weekend days for quick cross-checking. No public holidays are excluded — this is a pure Mon–Fri counter.

The calculation uses fast modular arithmetic rather than looping through every day, so it handles long ranges — years, decades — instantly. Everything runs in your browser; nothing is uploaded.

FAQ

Does it account for public holidays? No. Holidays vary by country, region, and year. This tool counts Monday–Friday days only; subtract your own holiday count from the result.

What does "inclusive" mean exactly? Inclusive counts the start date and end date themselves (if they are weekdays). Exclusive counts only the days strictly between them, like how some SLA contracts count "business days after receipt".

Does the order of the two dates matter? No. The tool sorts the dates internally and always returns a non-negative count.