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This calculator provides estimates only. Actual BAC varies based on many factors including food intake, medications, metabolism, and health conditions. Never drink and drive. When in doubt, don't drive. This tool is for educational purposes only.
Estimate blood alcohol content based on drinks consumed
Affects body water ratio used in calculation
Body metabolizes ~0.015% BAC per hour on average
| BAC Level | Effects | Legal Status |
|---|---|---|
| 0.00-0.02% | Minimal or no impairment | Legal to drive (most jurisdictions) |
| 0.02-0.05% | Relaxation, lowered inhibitions, mild euphoria | Legal but impaired |
| 0.05-0.08% | Impaired judgment, coordination, reaction time | Illegal in some countries |
| 0.08-0.15% | Major impairment, slurred speech, poor balance | ILLEGAL - DUI/DWI |
| 0.15-0.30% | Severe impairment, blackout risk, vomiting | DANGEROUS |
| 0.30%+ | Loss of consciousness, respiratory depression | LIFE-THREATENING |
In the US, one standard drink contains approximately 14 grams of pure alcohol:
12 oz (355 mL)
~5% ABV
5 oz (148 mL)
~12% ABV
1.5 oz (44 mL)
~40% ABV (80 proof)
BAC calculators provide estimates based on average values. Actual BAC can vary significantly based on food intake, medications, health conditions, drinking speed, and individual metabolism. Always err on the side of caution.
Women typically have a higher body fat percentage and lower body water percentage than men of the same weight. Since alcohol distributes in body water, women generally achieve higher BAC from the same amount of alcohol.
Yes. Eating before or while drinking slows alcohol absorption, resulting in a lower peak BAC. However, total alcohol absorbed remains the same - food just spreads it out over more time.
No. Coffee, cold showers, exercise, and food do NOT speed up alcohol metabolism. Only time allows the liver to process alcohol. The average person metabolizes about 0.015% BAC per hour.
In most US states, 0.08% BAC is the legal limit for driving. However, you can be charged with impaired driving at lower levels, and commercial drivers have a 0.04% limit. Some countries have 0.05% or even 0.00% limits.
Seek immediate medical attention if someone has: unconsciousness or difficulty staying awake, slow/irregular breathing, vomiting while unconscious, pale/blue-tinged skin, hypothermia, or seizures.