Important: This is a rough educational estimate — not a breathalyzer or legal defense. Never drink and drive. Impairment can start below legal limits. If you need a ride, use a designated driver or rideshare.
Sex
1 standard drink ≈ 14 g alcohol (12 oz beer / 5 oz wine / 1.5 oz spirits)
Estimate
Est. BAC
0.000
How this BAC calculator works
It applies a simplified Widmark formula using standard drinks, body weight, a sex-based distribution factor, and an average elimination rate (~0.015%/hour). Real BAC varies with food, medications, health, and drink strength.
FAQ
What is the legal limit in the U.S.?
Often 0.08% BAC for drivers 21+, with lower limits for commercial drivers and under-21 in many states. Local laws differ. Impairment can occur well below the limit.