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How the BAC Calculator Works The Widmark Formula Explained This calculator uses the Widmark formula, the standard method for estimating BAC: A Total pure alcohol consumed in ounces (drinks x 0.6 oz per standard drink) W Body weight in pounds r Gender constant: 0.73 for males, 0.66 for females H Hours elapsed since the first drink 5.14 Conversion factor (alcohol density and volume adjustment) 0.015 Average hourly BAC elimination rate Understanding the Fields Each field in the calculator directly affects the Widmark formula result
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