Business Days Calculator

Count workdays between two dates, excluding weekends and any optional holiday dates you enter.

—

Start dateEnd date

Holidays (YYYY-MM-DD, one per line)

Business days00 weekdays − 0 listed holidays

✓ Your data stays on your device✓ Free · no sign-up✓ Runs locally

About this tool

About this tool

How to use it

Choose the first and last date of the period.
Enter any holidays to exclude, separated by spaces, using YYYY-MM-DD.
Read the inclusive weekday count after Saturdays, Sundays and entered holidays are removed.

Method

The calculator walks from the start date through the end date inclusively. Monday through Friday count as workdays unless the date exactly matches an entered YYYY-MM-DD holiday.

Worked example

Monday 24 August through Friday 28 August counts as 5 business days. Enter 2026-08-26 as a holiday and the result becomes 4.

Limits to know

Saturday and Sunday are always treated as weekends. Public holidays are not added automatically, and alternative workweeks or partial working days are not supported.

Reference: MDN Web Docs — weekday values · Last reviewed: 2026-10-12

Supported formats

Start and end dates; optional holidays in YYYY-MM-DD format; Saturday/Sunday weekend

Private by design

Your data stays on your device. No account is required.

Frequently asked questions

Are the start and end dates included?

Yes. Both dates are counted when they fall on Monday through Friday and are not listed as holidays.

Does the calculator know public holidays automatically?

No. Holiday rules vary by country and region, so only the YYYY-MM-DD dates you enter are excluded.

What weekend does it use?

Saturday and Sunday are treated as weekends. This version does not support alternative workweeks.