Dates & Time

Business Days Calculator

Count weekdays between two dates, excluding Saturdays and Sundays.

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Business Days Calculator

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Dates & Deadlines

Calendar-day differences, business-day counting, days-until questions and date arithmetic.

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How to use this business days calculator

Enter the requested values above and select Calculate. The result updates immediately on the page, so you can change one value and compare different scenarios without leaving the calculator.

Formula and method

Each date in the range is counted when it falls Monday through Friday. U.S. holidays are not automatically excluded.

Example

Use this calculator for weekday counts when weekends—not holidays—are the days you need to exclude.

What this calculator is useful for

Count weekdays between two dates, excluding Saturdays and Sundays. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.

Monday to Friday: five weekdays

August 3–7, 2026 is Monday through Friday. Including both dates gives 5 weekdays. Switching the endpoint option to No excludes both Monday and Friday, leaving 3 weekdays.

How to interpret the result

Use this for a rough weekday count for processing times or project workdays; choose the endpoint rule your deadline uses.

Important limitation

This tool does not subtract federal, state, local, or employer-specific holidays. For a deadline tied to a contract or filing, confirm holiday and cutoff rules separately.

Continue with: Days Between Dates Calculator · Day of Week Calculator

Frequently asked questions

What does the Business Days Calculator calculate?

Count weekdays between two dates, excluding Saturdays and Sundays.

How does the calculation work?

Each date in the range is counted when it falls Monday through Friday. U.S. holidays are not automatically excluded.

Is this calculator free?

Yes. ERICH Calculators is free to use and no account is required.

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Method, assumptions & corrections

See how formulas, sources and limitations are handled across ERICH Calculators.