Blood Alcohol Content (BAC) Calculator

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Estimate your blood alcohol content from sex, body weight, drinks consumed and time elapsed using the Widmark formula — for education only.

kg
One standard drink ≈ 14 g of pure alcohol.
Estimated BAC – %
Impairment level –
Time to reach 0.00% –
Estimate only — never use this to decide whether to drive. The Widmark formula varies greatly with food, metabolism, medication and health. When in doubt, do not drive.
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