What Is Business Day Counter?

A free online business day counter. Enter any two dates to calculate the number of working days between them. Automatically excludes Saturdays and Sundays. Optionally exclude common public holidays (New Year, Christmas, Easter) or add custom dates. Results include total business days, calendar days, weekend days, work weeks, and the percentage of work days. Perfect for project deadline planning, HR leave calculations, contract timeline management, and academic scheduling — all running locally in your browser.

When planning projects, calculating delivery dates, or managing HR leave, calendar days are misleading — what matters are the working days. Business Day Counter calculates the exact number of business days between any two dates, automatically excluding Saturdays and Sundays, with optional exclusion of public holidays and custom non-working days.

The base calculation excludes weekends (Saturday and Sunday). Toggle "Exclude common holidays" to automatically remove New Year's Day (Jan 1), Christmas Day (Dec 25), and Easter Sunday (date varies by year). For holidays specific to your country or company, add custom dates in YYYY-MM-DD format, one per line. All excluded dates are clearly listed so you know exactly which days were removed.

The results break down the entire period: total business days, total calendar days, weekend days, work weeks (business days / 5), and the percentage of business days in the period. For example, between December 1 and December 31 with Christmas excluded: 31 calendar days, 22 business days, 9 weekend days, 1 holiday, 4.4 work weeks, and 71% working days.

All calculation runs locally in your browser. No dates are sent to any server. This is particularly important for HR and legal use cases where date information may be confidential.

Real-World Use Cases for Business Day Counter

Calculating Delivery Date for a 15-Business-Day Project

A project manager starts a 15-business-day project on Monday, June 3. They enter June 3 as the start and see that the end date (15 business days later) is June 21 — excluding weekends. They share this with the client as the expected delivery date.

HR Calculating Annual Leave Entitlement

An HR manager calculates the business days between an employee's start date and the end of the year to determine prorated annual leave. They enter the two dates and exclude company holidays. The result shows exactly how many working days the employee will be employed.

Contract Timeline with Custom Exclusions

A legal team calculates the business days in a 90-day contract period. They add the company's annual shutdown dates as custom exclusions. The final count of 62 business days determines the service delivery deadline. The percentage breakdown helps set expectations.

Why Use Business Day Counter?

  • Excludes weekends (Saturday and Sunday) automatically
  • Optional public holiday exclusion (NYE, Christmas, Easter)
  • Custom date exclusion with free-form text input
  • Shows business days, calendar days, weekends, work weeks, and ratio
  • All calculation is local — no data sent to any server

How to Use Business Day Counter — Step by Step

1

Select the start and end dates using the date pickers.

2

Toggle "Exclude common holidays" to remove New Year, Christmas, and Easter.

3

Add custom excluded dates in YYYY-MM-DD format, one per line.

4

View the total business days, calendar days, and work weeks instantly.

Who Is Business Day Counter Best For?

  • project deadline planning
  • HR leave calculations
  • contract timeline management
  • academic scheduling

Pro Tips for Business Day Counter

  • 1Add your company's annual shutdown days (between Christmas and New Year, for example) as custom exclusions. The tool will remember them by storing them in your browser's session.
  • 2For multi-year projects, calculate business days for each year separately. Public holidays and company shutdowns often change year to year, so a single calculation may not be accurate.
  • 3The work weeks display (business days / 5) is useful for professional services contracts that bill in weekly increments. 22 business days = 4.4 work weeks.
  • 4Use the total calendar days alongside business days to communicate timelines clearly to stakeholders. Stakeholders often think in calendar days, while project teams work in business days.

Business Day Counter — Frequently Asked Questions

Which days are excluded by default?

By default, only weekends (Saturday and Sunday) are excluded. Common holidays and custom dates are optional exclusions you can enable.

How are work weeks calculated?

Work weeks are calculated by dividing total business days by 5. For example, 23 business days equals 4 work weeks and 3 additional work days.

How accurate are the calculations?

All calculations use double-precision floating-point arithmetic following IEEE 754 standards. Financial calculations like loans and compound interest are verified against standard spreadsheet formulas.

Can I round results to a specific number of decimal places?

Results are typically displayed with up to 10 significant digits. You can mentally round to your desired precision for most practical use cases.

Is Business Day Counter really free to use?

Yes, Business Day Counter is completely free with no hidden charges, no usage limits, and no premium tiers. You can use it as often as you need without signing up or providing any personal information.

Ready to Use Business Day Counter?

Free online tool — works in your browser, no sign-up required. Start using it right now.

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