What is BAC Calculator?
BAC Calculator is a free online tool that estimates Blood Alcohol Content (BAC) using the Widmark formula. We believe safety tools should be simple, accurate, and accessible to everyone without compromising privacy.
Our calculator runs entirely in your browser. Your inputs never leave your device. Use it to understand how weight, gender, time, and standard drinks may influence your estimated BAC.
Key Features
Privacy & Security
- Local Calculations: All calculations happen in your browser - your inputs never leave your device
- No Registration: Use the calculator immediately without creating accounts or providing personal information
- Secure Connection: HTTPS encryption ensures your session remains protected
Performance & Quality
- Fast and Clear: See your estimated BAC instantly with clear guidance
- Educational: Learn how factors affect BAC and why estimates vary
- Helpful Outputs: See time-to-sober estimate and typical legal limits
- Universal Compatibility: Works on all modern browsers and devices without installation
Why Choose Our Calculator
Universal Compatibility
Make safer decisions by understanding your estimated BAC. Use it before driving or operating machinery, and learn the limits applicable in your region.
Professional Quality
The tool is simple, fast, and privacy-first. It is designed for education and awareness, not for legal use.
Our Mission & Community
We believe that safety tools should be accessible to everyone. That's why our BAC Calculatorwill always be free, with no hidden costs, subscriptions, or limits.
Our growing community includes drivers, designated drivers, bartenders, event planners, students, and safety-conscious individuals who trust our calculator for responsible decision-making. We're proud to serve over 50,000+ users monthly who have made safer choices using our BAC estimation tool.
We're committed to continuously improving our service based on user feedback and the latest research in alcohol metabolism. Our goal is to make BAC estimation as accurate and educational as possible while maintaining the highest standards of privacy and accessibility.