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Blood Alcohol Calculator

Estimate BAC using the Widmark formula. For education only.

Body Weight (kg)

Number of Standard Drinks

1 standard drink = 10g pure alcohol (1 beer, 1 glass wine, 1 shot)

Hours Since First Drink

Estimated BAC

0.00

g/dL (‰)

Sober

Sober in approx.

—

Legal Limit (DE)

0.05% (0.5‰)

warning This is an estimate only. Never drink and drive. Individual results vary significantly.