Are both dates included?

Yes. In count mode the start date and end date are both tested.

Does it exclude weekends?

Yes. Saturday and Sunday are excluded from business-day totals.

Does it include U.S. federal holidays?

The holiday option excludes common observed U.S. federal holidays, but local and employer calendars can differ.

Can I subtract business days?

Yes. Enter a negative number in add/subtract mode to move backward from the start date.

What does 0 business days mean?

0 business days returns the start date because no workday offset is applied.

Business Days Calculator

Count business days between two dates or add and subtract business days with weekends and optional U.S. federal holidays excluded.

Start date

End date

Exclude common U.S. federal holidays when possible

Count business days between dates

English SERPs for business days focus on workday counting, project deadlines and Excel-style NETWORKDAYS logic. This page counts weekdays between two dates and can exclude common observed U.S. federal holidays.

D_{b u s in ess} = d = s t a r t \sum e n d I (d \in / w ee k e n d, d \in / h o l i d a y s)

Dbusiness — business days counted in the selected range.
d — each calendar date from start through end.
start — the first date in the range.
end — the last date in the range.
I — the include/exclude test for weekends and selected holidays.

Add or subtract workdays

In add/subtract mode, the start date is the anchor. A one-business-day offset moves to the next eligible business day rather than counting the anchor itself.

d a t e_{r es u l t} = s t a r t \pm N_{b u s in ess}

dateResult — the returned calendar date.
start — the anchor date.
Nbusiness — the number of business days to move.
plusMinus — forward for positive values and backward for negative values.

Calendar caveat

Holiday observance can differ by employer, state, school, court or exchange. Use this as a planning calculator, not a legal deadline authority.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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