Widmark Blood-Alcohol Estimate
Widmark blood-alcohol estimate (1932): BAC = A / (r x weight x 10) - 0.015 x hours, where r = 0.68 (male) / 0.55 (female); a population estimate, not a legal measurement.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Pure alcohol consumed
- 56 g
- Body weight
- 70 kg
- Hours since drinking
- 0 h
- Sex
- Male
Result: Estimated BAC 0.12% — at or above the 0.08% legal limit.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 0.08%
- Below the common legal driving limit.
- >= 0.08%
- At or above the limit (A / (r x weight x 10) - 0.015 x hours). A population estimate, not a legal measurement or diagnosis.
What you enter
- Pure alcohol consumed
- Body weight
- Hours since drinking
- Sex
How this is calculated
Widmark EMP. Die theoretischen Grundlagen und die praktische Verwendbarkeit der gerichtlich-medizinischen Alkoholbestimmung. 1932. (Widmark equation.) Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.