How do I add business days to a date?

Enter a start date, choose Add, enter the number of business days, and the calculator skips weekends and selected holidays.

Can this subtract business days?

Yes. Choose Subtract to move backward from the start date while excluding weekends and holidays.

Which holidays are excluded?

The US federal holiday preset includes observed holidays, and you can add custom YYYY-MM-DD holiday dates.

Business Days Calculator

Add or subtract business days from any date. Skip weekends, US federal holidays, and your own custom blackout dates for ops planning, SLAs, shipping windows, and launch checklists.

Runs locally in your browser. Weekends, US holidays, and custom holidays are excluded from the result.

Start date

Business days

Operation

Add Subtract

Exclude US federal holidays

Custom holidays Use YYYY-MM-DD dates, one per line or comma-separated.

Result date

Weekday

Calendar Days Moved

Business Days Counted

Weekends Skipped

Holidays Skipped

Holiday Mode

Add or subtract workdays without spreadsheet drift

Use this business days calculator for due dates, response windows, delivery estimates, internal SLAs, payroll deadlines, and project planning. The start date is not counted; the calculator moves forward or backward until the requested number of valid business days has passed.

FAQ

Does the start date count as a business day? No. Adding one business day from Monday returns Tuesday, unless Tuesday is excluded.

Which holidays are included? The US federal holiday preset includes observed holidays. You can also add custom YYYY-MM-DD dates.

Can I subtract business days? Yes. Choose Subtract to move backward while skipping weekends and holidays.