Business Days Calculator
Part of Time & Date Calculators
Calculate the number of working days between two dates, excluding weekends and optionally holidays.
How to Use the Business Days Calculator
This business days calculator helps you determine the number of working days between two dates, automatically excluding weekends (Saturdays and Sundays). Simply select your start and end dates, and the calculator will instantly compute the number of business days.
- Select your Start Date using the date picker
- Select your End Date using the date picker
- Choose whether to include the start and end dates in your calculation
- Click Calculate to see the results
- View the detailed breakdown showing total days, weekends excluded, and calendar days
What are Business Days?
Business days, also known as working days or weekdays, are the days of the week when most businesses and government offices are open and operating. In most countries, business days are Monday through Friday, excluding weekends (Saturday and Sunday) and public holidays.
Calculating business days is essential for project management, contract deadlines, shipping estimates, and financial transactions. Many business agreements specify timelines in business days rather than calendar days to account for the fact that work typically doesn't occur on weekends.
Why Calculate Business Days?
Project Management: When planning projects, knowing the exact number of working days helps create realistic timelines and deadlines. This prevents overestimating available time by accidentally counting weekend days. Use our Date Calculator to add or subtract days from any date.
Contract Deadlines: Legal and business contracts often specify response times or completion dates in business days. Accurately calculating these periods ensures compliance with contractual obligations.
Shipping and Delivery: Many shipping companies provide delivery estimates in business days. This calculator helps you determine when to expect packages or when to send items to meet specific deadlines.
Financial Planning: Banks and financial institutions typically process transactions on business days only. Understanding business day calculations helps with cash flow management and payment scheduling.
Business Days vs Calendar Days
The key difference between business days and calendar days is that calendar days include every single day of the week, while business days exclude weekends. For example, if you start on a Friday and count 5 calendar days, you'd end on Tuesday. However, 5 business days from Friday would actually end the following Friday, as the weekend days don't count. Our Week Number Calculator can help with ISO week-based scheduling.
Common Use Cases
Invoice Payment Terms: Many invoices specify "Net 30" or "Net 15" payment terms in business days. This calculator helps vendors and customers understand exact payment deadlines.
Service Level Agreements (SLAs): IT and customer service departments often commit to response times measured in business days. This tool ensures accurate SLA tracking and reporting.
Legal Response Periods: Court filings and legal responses often have deadlines specified in business days. Legal professionals use business day calculators to ensure timely submissions and compliance with court rules. Check our Working Days Left Calculator to see remaining work days in the month or quarter.