Blood Alcohol Concentration (BAC) Calculator
Estimate your Blood Alcohol Content (BAC) using the clinical Widmark equation, standard drink tallies, and calculate time until 100% sober.
Taxa média de eliminação hepática: ~0.015% BAC por hora (não acelerada por café ou banho frio).
Expected Physiological Effects
Lower alertness, relaxed inhibitions, reduced coordination and judgment.
How it works
1
Select biological sex and enter your body weight in pounds (lbs) or kilograms (kg).
2
Tally your drinks: standard beers (12 oz 5%), glasses of wine (5 oz 12%), or shots (1.5 oz 40%).
3
Input hours since your first drink began to view your current BAC percentage and sobriety countdown.
Frequently asked questions
What is the legal BAC driving limit in the United States?
In 49 US states, the legal limit for drivers aged 21 and older is 0.08% BAC (Utah enforces 0.05% BAC). Drivers under 21 and commercial drivers are subject to strict zero-tolerance limits (0.00% to 0.04%).
How fast does the body metabolize alcohol?
The human body metabolizes alcohol at a steady rate of approximately 0.015% BAC per hour. Neither coffee, cold showers, nor food will accelerate hepatic alcohol metabolism.
Is this tool free?
Yes. The site is supported by ads, so you never pay or need to create an account.
Does it work on mobile?
Yes. The page adapts to your screen and does not require installing any app.