Business Days Calculator
Calculate the number of business days (working days) between two dates, or add business days to a start date. Automatically excludes weekends. Free, instant, and private.
How the Business Days Calculator Works
This business days calculator counts only Monday through Friday, automatically excluding Saturdays and Sundays. In "Days Between" mode, it counts the working days between your start and end dates. In "Add Days" mode, it adds a specified number of business days to a start date to find the target date.
Business Days Examples
Mon to Fri (same week) = 4 business days
Mon to Mon (next week) = 5 business days
2 calendar weeks = 10 business days
When to Use a Business Days Calculator
Business days calculations are essential for project deadlines, shipping estimates, legal timelines, contract terms, payment due dates, and HR processes. Many business agreements specify timelines in "business days" or "working days" rather than calendar days. This calculator ensures accurate counting without manual effort.
Business Days for Shipping
Shipping carriers like UPS, FedEx, and USPS quote delivery times in business days. "3-5 business days" means 3-5 weekdays, not calendar days. An order placed on Friday with 3 business day shipping would arrive on Wednesday (Mon, Tue, Wed). Use this calculator to find exact delivery dates.
Tips for Getting Accurate Results
For the most accurate results, use up-to-date numbers from official sources. Double-check your inputs before calculating — small errors in the starting values can lead to significantly different outputs. If you are comparing scenarios, keep all variables the same except the one you are testing. Save or screenshot your results for future reference. This calculator uses standard formulas and is designed to give you a reliable quick estimate, though professional advice may be needed for complex situations.
Who Uses Business Days Calculator
This tool is used by anyone who needs a quick, reliable way to get results without downloading software or creating accounts. Students, professionals, hobbyists, and curious minds all benefit from having instant access to specialized tools in their browser. The privacy-first approach — where no data leaves your device — makes it suitable for sensitive information. Bookmark this page and return whenever you need it.