Blood Alcohol Content (BAC) Calculator

Calculate and estimate your Blood Alcohol Concentration (BAC %) and remaining sobriety timeline using the clinical Widmark Formula and Forrest Modification. Forensic toxicologists and medical professionals calculate blood alcohol levels by balancing total pure ethanol consumed against biological gender, total body water (TBW), body weight, gastric absorption factors (empty vs full stomach), and the hepatic enzymatic metabolism rate ($eta_{60}$ elimination rate of approximately .015% ext{–}0.017%$ BAC per hour).

Features include a multi-drink beverage builder (12 oz standard beer, craft IPAs, 5 oz wine, 1.5 oz spirits/shots, or custom ABV drinks), real-time legal driving limit warnings (US/UK 0.08%, European/Australian 0.05%, zero tolerance for commercial drivers), hours until fully sober (0.000% BAC), and cognitive and motor impairment level breakdowns.