Blood Alcohol Content Calculator
Estimate your blood alcohol concentration based on your drinking habits and personal factors
Understanding BAC (Blood Alcohol Content)
Blood Alcohol Content (BAC) is a measure of the amount of alcohol in your bloodstream. It is expressed as a percentage. For example, a BAC of 0.08% means that there are 0.08 grams of alcohol per 100 milliliters of blood.
BAC Levels and Effects
| BAC Range | Effects |
|---|---|
| 0.00 – 0.03% | Mild euphoria, relaxation, slight mood elevation |
| 0.04 – 0.06% | Feeling of warmth, relaxation, mild impairment of reasoning |
| 0.07 – 0.09% | Slight impairment of balance, speech, vision, and control; legally intoxicated in most states |
| 0.10 – 0.12% | Significant impairment of motor coordination and judgment, slurred speech |
| 0.13 – 0.15% | Major impairment of motor skills and judgment, blurred vision, loss of balance |
| 0.16 – 0.20% | Dysphoria, nausea, disorientation, possible anxiety or emotional swings |
| 0.21%+ | Severe motor impairment, memory blackout, risk of loss of consciousness. Medical emergency above 0.30%. |
Important Disclaimer
This calculator provides an estimate based on average metabolic rates and should not be used as a legal determination of intoxication or as a guide for determining if you are fit to drive. The only safe amount of alcohol to consume before driving is none.
Factors Affecting BAC
- Gender (biological differences in water content and enzymes)
- Weight and body composition
- Food consumption before or during drinking
- Medications and overall health
- Rate of consumption
- Type and strength of alcoholic beverages