Blood Alcohol Content (BAC)
Health & FitnessEstimate Blood Alcohol Concentration (BAC) and sober countdown hours using the clinical Widmark equation based on gender, body weight, drinks consumed, and elapsed drinking hours.
β 0.45 β° (promille) Β· estimated time to sober β 3 hrs
About this calculator
Understanding how alcohol is metabolized by the human body is essential for personal safety and responsible decision-making. Blood Alcohol Concentration (BAC) measures the percentage of alcohol in the bloodstream.
This calculator utilizes the clinically validated Widmark formula to estimate peak BAC and the metabolism countdown to reach 0.00% BAC. Note that individual metabolic rates vary significantly based on liver function, stomach food contents, and medications. Never drink and drive.
How It Works & Formula
Widmark formula: BAC = [Alcohol consumed in grams / (Body weight in grams Γ r)] Γ 100 - (Ξ² Γ Elapsed Hours), where r is gender body water distribution (0.68 for men, 0.55 for women) and Ξ² is average metabolic elimination rate (0.015% per hour).
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