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How to Calculate Blood Alcohol Content

Estimate your blood alcohol content (BAC) using the Widmark formula.

The Formula

(drinks * 14) / (weight * 453.592 * r / 1000) - 0.015 * hours

The blood alcohol content formula uses the mathematical relationship: (drinks * 14) / (weight * 453.592 * r / 1000) - 0.015 * hours. Each variable in the formula represents a measurable quantity that affects the final result.

Step-by-Step Method

  1. 1Identify all input values needed for the blood alcohol content calculation.
  2. 2Substitute your known values into the formula: (drinks * 14) / (weight * 453.592 * r / 1000) - 0.015 * hour.
  3. 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
  4. 4Check that your result has the correct units and is within a reasonable range.
  5. 5Verify using the interactive Blood Alcohol Content Calculator to confirm your answer.

Related Topics

bacblood alcoholalcoholdrinkingsafety

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Skip the manual math — get instant results with our free Blood Alcohol Content calculator.

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