Business Days Calculator

Calculate Business Days Between Dates

Add Business Days to a Date

What is a Business Days Calculator?

A business days calculator is a tool that counts working days between two dates while automatically excluding weekends (Saturday and Sunday) and public holidays. This is essential for project planning, deadline tracking, and HR calculations where only actual working days matter.

This calculator supports five countries with their respective public holidays: United States, United Kingdom, Taiwan, Australia, and Canada. You can calculate the number of business days between any two dates, or add a specific number of business days to a given date.

How to Use This Calculator

1. To calculate business days between dates: Enter your start and end dates, select the appropriate country for holidays, and click “Calculate”. The tool will display the total calendar days, weekend days, holidays, and business days.
2. To add business days to a date: Enter a start date, specify how many business days you want to add, select your country, and click “Add Days”. The calculator will skip weekends and holidays automatically.
3. View the calendar: After calculating, click “Show Calendar View” to see a visual representation where non-business days are highlighted in red.
4. Copy results: Click on any output value to copy it to your clipboard.

Common Use Cases

• Project Management: Calculate realistic project timelines by counting only working days for task completion estimates.
• HR & Leave Management: Determine return dates after vacation or sick leave by adding business days to an absence start date.
• Delivery & Logistics: Calculate expected delivery dates for goods or services based on business day commitments (e.g., “5 business days delivery”).
• Legal & Compliance: Track deadline compliance for legal filings or regulatory submissions that require response within a certain number of business days.
• Financial Planning: Calculate settlement dates or processing timelines for financial transactions that only occur on business days.
• Invoicing & Payment Terms: Determine payment due dates based on net business day terms (e.g., Net 10 business days).

Frequently Asked Questions

What days are considered weekends?

In this calculator, Saturday and Sunday are considered weekends and are excluded from business day counts across all countries. However, some countries may have different weekend definitions, but this tool uses the standard Monday-Friday working week.

Are public holidays included in the calculation?

Yes, public holidays are automatically excluded from business day counts. The specific holidays depend on the country you select. The tool includes the most common national holidays for each country.

Can I use past dates or future dates?

Yes, you can calculate business days for any date range, whether in the past or future. This is useful for historical analysis, project planning, and forecasting.

What if the start date is after the end date?

The calculator will display an error message. Always ensure your start date is before or equal to your end date.

How accurate are the holiday dates?

The calculator uses the official public holidays for each country. However, some holidays (like Easter) may vary by year. For the most critical business calculations, verify against your local holiday calendar.

Is my data private?

Yes, completely! This tool runs entirely in your browser using JavaScript. No data is sent to any server, and your dates are never logged or stored.