Business Days Calculator

Business Days Calculator counts the working days between two dates, or finds the date a given number of business days before or after a start date. You choose which weekdays are your weekend and list any holidays, and the result shows how many weekend days and holidays were skipped.

Delivery times, payment terms, legal deadlines and service-level agreements are usually stated in business days. Weekends differ between countries and holidays differ between organisations, so a configurable count avoids costly off-by-one mistakes.

1. Choose Count business days, or Add or subtract business days.
2. Enter the start date and either the end date or the number of business days.
3. Tick your weekend days (Saturday and Sunday by default).
4. Optionally list holidays, one YYYY-MM-DD date per line.
5. Press Calculate and review the breakdown, then copy or download the summary.

• Count business days between dates, with the start and end dates optionally included
• Add or subtract business days, forward or backward, including zero
• Custom weekend days for any working week
• Holiday list with validation of invalid and duplicate dates
• Holidays on weekend days are never counted twice
• Breakdown of calendar days, weekend days and holidays skipped

• Confirm whether your rule counts the start date — many contracts do not.
• Enter public holidays for the right country, region and year.
• Use custom weekends for Friday–Saturday or six-day working weeks.
• Keep a saved list of your organisation’s holidays to paste in each time.