Add Business Days
Add or subtract business days from a start date, skipping weekends and custom holidays. Free working-day calendar calculator in your browser.
Add or subtract business days from a calendar date
Contracts, payroll cutoffs, and shipping SLAs often speak in business days (working days)
rather than calendar days. This calculator starts from any date, moves forward or backward by the number of
business days you specify, and skips weekends plus any custom holidays you list (one YYYY-MM-DD
per line).
How to use it
- Pick the start date.
- Enter how many business days to add or subtract.
- Choose a weekend rule (Monday–Friday is the most common).
- Optional: paste company holidays to exclude them from the count.
- Read the result date and the day-by-day walkthrough table.
Need the count between two dates instead? Use Business Days or the broader Date Calculator.
Frequently Asked Questions
Does this include the start date in the count?
No. The tool moves day by day after the start date until it has counted the requested number of business days, similar to “add N business days” functions in spreadsheets.
Can I subtract business days?
Yes. Choose subtract to walk backward, still skipping weekends and listed holidays.
Is data sent to a server?
No. Date math runs entirely in your browser.
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