BAC Calculator
Estimate your blood alcohol content based on drinks consumed.
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Enter your details to estimate BAC
Per drink: 5% ABV, 355 ml
Important Warning
This is an estimate only. Do not drive after drinking. BAC is affected by many individual factors including food intake, medications, fatigue, and metabolism. Always err on the side of caution.
Widmark Formula
BAC (%) = (Alcohol grams / (Body weight kg × r × 10)) − (0.015 × Hours). Distribution factor r = 0.68 for males, 0.55 for females. Alcohol grams = Volume (ml) × ABV% × 0.789.