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Blood Alcohol Content (BAC) Calculator
Estimate your blood alcohol content based on drinks consumed, weight, and time.
About This Calculator
The Widmark formula estimates BAC based on weight, sex, drinks, and elimination rate. The liver metabolizes alcohol at roughly 0.015% BAC per hour for most people — coffee, water, and food do not speed this up. At 0.08% BAC, reaction time is 50% slower and crash risk is 7x higher.