DO NOT DRIVE BASED ON THESE RESULTS.. This BAC calculator provides an estimate only. By using this calculator you accept full legal responsibility for your actions and release this site from all liability.

The most accurate BAC calculator online

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Breathalyzers Know exactly how drunk you are

BAC Effects Chart
BACEffects
0.00–0.04%Relaxation and warmth
0.04–0.08%Euphoria and confidence
Minor impairment of judgement, speech, reaction time, memory, and balance
0.08–0.12%Driving is illegal
Obvious impairment of judgement, speech, reaction time, memory, and balance
0.12%+Dizziness or vomiting may occur (if drinking too fast or inexperienced)
Unstable emotions (anger, depression, and/or unease)
Blackouts (memory loss)
Get medical attention if slow breathing or unable to wake up

Four Loko BAC Calculator

A single 23.5 oz (695 ml) Four Loko at 14% ABV contains roughly 5–6 standard drinks — like drinking a six-pack in one can. Enter your weight, sex, and when you started to estimate your BAC. Four Loko is already filled in above.