Estimate BAC
Legal Agreement

Terms of Service

Last Updated: September 2026•Effective Immediately

CRITICAL MEDICAL & LEGAL DISCLAIMER

This website provides mathematical estimates for educational purposes only. It is not a breathalyzer, diagnostic medical device, or legal proof of sobriety. You expressly agree NEVER to use these calculations to decide whether to drive a motor vehicle, operate machinery, or perform safety-critical activities.

1. Acceptance of Terms

By accessing, browsing, or using the BAC Calculator website or any of its standalone calculator tools, you acknowledge that you have read, understood, and agreed to be bound by these Terms of Service and our Privacy Policy. If you do not agree to these terms, do not access or use this platform.

2. Intended Audience & Age Safety Gate

This website is intended exclusively for adults of legal drinking age in their respective jurisdiction (21 years of age or older in the United States). By using our calculators, you confirm that you meet this minimum age requirement.

3. Educational Use Only — No Medical or Legal Reliance

The materials, formulas, and estimates presented on this site are derived from generalized population pharmacokinetic models (Widmark 1932). Human metabolic and physiological responses vary widely.

  • No Safe-to-Drive Certification: A calculated result showing a BAC under 0.08%, 0.05%, or even 0.00% is not proof that you are legal, sober, or physically capable of driving. Alcohol impairs motor skills before statutory limits, and hangover fatigue persists long after ethanol elimination.
  • No Emergency Substitute: This tool cannot diagnose alcohol poisoning. If someone is unresponsive, vomiting repeatedly, or breathing irregularly, you must call 911 immediately rather than consulting a calculator.

4. Limitation of Liability

To the fullest extent permitted by applicable law, BAC Calculator, its contributors, developers, and educators disclaim all liability for any direct, indirect, incidental, consequential, special, or exemplary damages—including personal injury, vehicular accidents, property damage, DUI arrests, fines, or loss of life—arising out of or in connection with your access to, use of, or inability to use this website.

5. Acceptable Use & Prohibited Conduct

You agree not to use the website to:

  • Encourage excessive alcohol consumption, binge drinking, or drinking games.
  • Attempt to evade, defeat, or manipulate law enforcement alcohol breath testing or ignition interlock devices.
  • Scrape, reverse-engineer, or disrupt the operation of the website.