Blood Alcohol Concentration (BAC) Calculator
Calculate your BAC levels for educational and safety awareness purposes
Blood Alcohol Concentration (BAC) Calculator
Calculate your Blood Alcohol Concentration (BAC) based on alcohol consumption, body weight, and time elapsed. This tool helps estimate intoxication levels for educational purposes only.
⚠️ Warning: This calculator is for educational purposes only. Never use this to determine if you're safe to drive.
👤 Personal Information
📊 BAC Results
BAC Levels & Effects
⚖️ Legal Limits & Safety
United States
- • Legal driving limit: 0.08%
- • Under 21: 0.01-0.05%
- • Commercial drivers: 0.04%
Important Warning
This calculator provides estimates only. Individual factors like medication, food intake, and health conditions can significantly affect BAC levels.
Safety First
Never rely on BAC calculations to determine if you're safe to drive. When in doubt, don't drive. Use public transportation or ride-sharing services.
📚 Understanding Blood Alcohol Concentration
What is BAC?
Blood Alcohol Concentration (BAC) is a measurement of alcohol intoxication, expressed as a percentage of alcohol per volume of blood. For example, 0.08% means 0.08 grams of alcohol per 100 mL of blood.
Factors Affecting BAC
BAC is influenced by body weight, gender, food consumption, rate of consumption, time elapsed, and individual metabolism. These factors can cause significant variations.
Health Considerations
Alcohol consumption has both short-term and long-term health effects. Even moderate drinking carries risks, and heavy drinking can lead to serious health problems.
BAC Calculation Formula
BAC is calculated using the Widmark formula, which takes into account alcohol consumed, body weight, and gender:
For Men
BAC = (alcohol in grams / (body weight in kg × 0.68)) - (0.015 × hours)
For Women
BAC = (alcohol in grams / (body weight in kg × 0.55)) - (0.015 × hours)