Business Days Calculator
Add business days to a date or count working days between two dates. Find out exactly when 5, 10, or 30 business days from today falls.
About the Business Days Calculator
Business days — also called working days or weekdays — are Monday through Friday, excluding weekends. They are the standard unit for legal deadlines, shipping estimates, invoice payment terms, project timelines, and contractual obligations. When a contract says payment is due 'net 30 business days' or a courier promises delivery 'in 5 business days,' knowing the exact calendar date that corresponds to requires careful counting, especially across weekends.
Our business days calculator solves this in two modes. Add Business Days: enter a start date and a number of business days to advance forward — the calculator skips every Saturday and Sunday and returns the exact end date. Count Business Days: enter a start and end date to find how many business days fall between them. Both modes are particularly useful for legal filings (where statutes often specify business-day deadlines), HR processes (notice periods, onboarding timelines), and procurement (purchase-order-to-delivery tracking).
Note that this calculator counts strictly on a weekday basis and does not subtract public holidays. Federal holidays like Christmas, Thanksgiving, and Independence Day are observed by government agencies, courts, and many businesses — but not universally. For critical legal or contractual deadlines, verify whether specific holidays are excluded in the governing jurisdiction or contract, and adjust manually if needed.
Pros & Cons
- +Add any number of business days to a start date and find the exact end date
- +Count business days between two dates with calendar and weekend day breakdown
- +Instantly answers 'how long is 5 business days from today'
- +Useful for legal, HR, procurement, and project management deadlines
- +Downloadable result for documentation purposes
- −Does not subtract public holidays (federal, state, or country-specific)
- −Only accounts for Monday–Friday weekdays; different countries may observe different weekends
- −Does not handle company-specific non-working days (custom shutdowns, half-days)
- −Date input relies on browser date picker — format may vary by device
- −For mission-critical legal deadlines, always verify the exact count manually
What Counts as a Business Day?
A business day is generally defined as any day that is not a Saturday, Sunday, or public holiday. In practice, the term is used slightly differently depending on the context. In US federal law and many contracts, 'business days' means weekdays excluding weekends and federal public holidays. In international trade, 'working days' may exclude the public holidays of the relevant country. In banking, 'banking days' typically means days that the relevant bank is open, which may exclude additional state or local holidays.
The distinction between business days and calendar days creates meaningful differences for any deadline calculation. Five calendar days from a Monday is a Saturday — a non-delivery day for most couriers. Five business days from a Monday is the following Monday (skipping the weekend). Ten business days spans exactly two work weeks. Thirty business days is six work weeks — approximately 42 calendar days.
For legal purposes in the United States, Rule 6 of the Federal Rules of Civil Procedure defines how to count days for court deadlines: count every day including weekends and holidays, but if the last day falls on a weekend or holiday, extend to the next business day. This is different from a business-days calculation — always check whether a specific rule applies to your deadline.