Business Days Calculator

Add or subtract working days from a date, or count business days between two dates — with optional US federal holidays excluded.

Business Days

Exclude US Federal Holidays Leave off for a plain Mon–Fri calculation
—
Set your inputs to begin
Calendar Days—
Weekend Days—

Related Calculators

How Business Days Are Counted

A business day is any Monday through Friday. With the holiday toggle on, this calculator also skips US federal holidays — and correctly applies the "observed" shift when a fixed-date holiday (like Independence Day or Christmas) falls on a weekend, moving it to the nearest weekday, matching standard US federal practice.

Frequently Asked Questions

What counts as a business day?+

A business day is any Monday through Friday. This calculator can optionally also exclude US federal holidays, which are business closures for most US banks, government offices and many companies.

Does this account for holidays that fall on a weekend?+

Yes. When a fixed-date US federal holiday falls on a Saturday, it's treated as observed the preceding Friday; when it falls on a Sunday, it's treated as observed the following Monday, matching standard US federal practice.

Can I use this outside the United States?+

Yes — leave the holiday exclusion off and it works as a plain Monday-Friday business day calculator anywhere. The holiday list is specifically US federal holidays, so only turn it on if that applies to you.