Estimate your current %BAC (blood alcohol concentration) and how long it will take until you are sober (ie. your BAC drops to zero)

Updated: July 19th, 2019

Note that the legal limit for driving a motor vehicle varies between countries or even states. The most accurate method to measure the %BAC is by using a breathalyzer, this is a rough estimation.

The results are computed using a formula based on alcohol pharmacokinetics research by E.M.P. Widmark. This formula tries to be as accurate as possible but it does not take into account advanced factors that may influence the BAC such as age, amount of food ingested (if any) and others.

See bottom of this page for a brief description of the effects of alcohol on the human body broken down by BAC levels.

How quickly does my BAC decrease?
Once you've stopped drinking, your body will typically metabolize alcohol at a rate of 0.016% BAC per hour, regardless of the type of beverage. This will take longer as the amount of alcohol you've absorbed increases.

Can I speed up alcohol metabolism?
NO. There isn't any real trick to lower your BAC faster than normal. Once the alcohol is absorbed into your system, that's it. The only thing you can do is have something to eat BEFORE you start drinking, as it will help your liver break down alcohol slightly faster.

Can I slow down alcohol absorption?
Eating before drinking, pacing your alcohol intake over a longer period of time and staying hydrated will help, but not dramatically. The most effective method is to simply go with drinks that have a lower alcohol content.

Blood Alcohol Calculator (BAC)

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Alcohol Effects by BAC Level:

0.01 0.05  g/1000ml

Average individual appears normal

0.03 0.12  g/1000ml

Mild euphoria, talkativeness, decreased inhibitions, decreased attention, impaired judgment, increased reaction time

0.09 0.25  g/1000ml

Emotional instability, loss of critical judgment, impairment of memory and comprehension, decreased sensory response, mild muscular incoordination

0.18 0.30  g/1000ml

Confusion, dizziness, exaggerated emotions (anger, fear, grief) impaired visual perception, decreased pain sensation, impaired balance, staggering gait, slurred speech, moderate muscular incoordination

0.27 0.40  g/1000ml

Apathy, impaired consciousness, stupor, significantly decreased response to stimulation, severe muscular incoordination, inability to stand or walk, vomiting, incontinence of urine and feces

0.35 0.50  g/1000ml

Unconsciousness, depressed or abolished reflexes, abnormal body temperature, coma; possible death from respiratory paralysis