Blood Alcohol Content (BAC) Calculator
Calculate your estimated blood alcohol content based on your weight, gender, drinks consumed, and time spent drinking.
Results
Blood Alcohol Content (BAC)
0.000%
You are sober
Time Until Sober
0 hours
Approximate time until BAC reaches 0.00%
Important Notes
- This calculator provides only an estimate of your BAC.
- Many factors can affect your actual BAC, including food consumption, medications, and individual metabolism.
- In most states, the legal limit for driving is 0.08% BAC.
- Never drink and drive. Always plan for a designated driver or alternative transportation.
Understanding Blood Alcohol Content (BAC)
Blood Alcohol Content (BAC) is a measure of the amount of alcohol present in a person’s bloodstream. It is expressed as a percentage of alcohol per volume of blood. For example, a BAC of 0.10% means that 0.10% of your blood is alcohol.
BAC Effects at Different Levels:
| BAC Level | Typical Effects |
|---|---|
| 0.02 – 0.03% | Slight euphoria, relaxation |
| 0.04 – 0.06% | Feeling of warmth, minor impairment of reasoning and memory |
| 0.07 – 0.09% | Slight impairment of balance, speech, vision, reaction time |
| 0.10 – 0.125% | Significant impairment of motor coordination, slurred speech |
| 0.13 – 0.15% | Gross motor impairment, blurred vision, serious disorientation |
| 0.16 – 0.20% | Nausea, dysphoria, possible blackout |
| 0.25% and above | Risk of coma, death from respiratory arrest |
Factors Affecting BAC:
- Body Weight: Heavier people generally have more blood and body water to dilute alcohol.
- Gender: Women typically have higher BAC than men after consuming the same amount of alcohol due to differences in body composition.
- Food Consumption: Eating before or while drinking slows alcohol absorption.
- Rate of Consumption: Drinking quickly results in higher BAC than drinking the same amount over a longer period.
- Medications: Some medications can interact with alcohol and affect BAC.
- Tolerance: Regular drinkers may show fewer signs of impairment at higher BAC levels, but their BAC is still elevated.