Blood Alcohol Content (BAC) measures the percentage of alcohol in the bloodstream. It is calculated using the Widmark formula, which accounts for body weight, sex, number of drinks, and time elapsed. A BAC of 0.08% is the legal driving limit in most US states.
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Pro Tip
BAC calculators estimate — not measure. Actual BAC varies based on medications, food intake, liver health, and individual metabolism. Never rely on a calculation to decide if it is safe to drive.
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Did You Know?
The liver metabolizes approximately 1 standard drink per hour regardless of sex, weight, or coffee intake. Only time reduces BAC — no food, water, or caffeine speeds this up.
References
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