Time & Date
Business Days Calculator
Add or subtract a number of business days from any date, automatically skipping weekends.
Result date
Friday, October 9, 2026
Skips Saturdays and Sundays. Public holidays aren't excluded.
How the Business Days Calculator works
Choose a start date, a number of business days, and a direction. The calculator steps forward or backward one day at a time, skipping weekends, to find your result date.
Frequently asked questions
Does this exclude public holidays?
No — it only skips Saturdays and Sundays. Public holidays vary by country and region, so they aren't excluded automatically.
Can I subtract business days too?
Yes — switch to "Subtract" to count backward from your start date.
Guides that cover this
Mastering Dates, Deadlines, and Time ZonesThe everyday date math — ages, countdowns, business days, time zones — that's easy to get wrong by hand.How Date and Business-Day Math Actually WorksHow business-day calculations skip weekends correctly, why manual day counts are frequently off by one, and how calendar days differ from business days.Calculating a Deadline That's a Set Number of Business Days AwayA worked example showing exactly how a 'within 10 business days' deadline is calculated, weekend by weekend.Why Your Business Day Count Was Off by One DayThe single most common cause of an off-by-one error in manual business-day counting, and how to avoid it consistently.Business Days vs. Calendar Days: Which One Contracts Actually UseWhy legal and contractual deadlines specify business days or calendar days explicitly, and what happens when a document doesn't specify.How to Use the Business Days CalculatorA quick walkthrough of adding or subtracting business days from a date, and calculating the number of business days between two dates.