BAC Calculator

Estimate BAC with transparent assumptions.

Choose alcohol inputUse standard drinks or enter beer, wine, liquor, and another beverage.

2 options

Gender

Standard

drinks

Body Weight

Hours elapsed

hours

ESTIMATED BAC0.052%

Widmark estimate from 42.0 g alcohol. Any alcohol can impair driving; do not drive or use this estimate to decide whether to drive. Educational estimate only; not medical advice.

Pure alcohol: 42.0 g
Estimated time to zero: 3.5 hours

Estimate based on the values shown

Formula checkedWidmark estimate from ethanol grams, body weight, sex distribution factor, and elapsed time.

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