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Blood Alcohol Content Widmark Formula Calculator

BAC = (A×5.14) / (W×r) − 0.015×H (g/dL).

Estimates Blood Alcohol Concentration (BAC) using the Widmark formula from number of drinks, body weight (lbs), sex-specific distribution factor r, and hours since drinking.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BAC = (drinks×0.6×5.14) / (weight_lbs×r) − 0.015×hours (g/dL)

In depth

Estimates Blood Alcohol Concentration (BAC) using the Widmark formula from number of drinks, body weight (lbs), sex-specific distribution factor r, and hours since drinking.