Blood Alcohol Content (BAC) Calculator
Result
Blood Alcohol Content (BAC) Calculator Estimate blood alcohol content (BAC) using the Widmark formula. — free online calculator.
Formula
- Blood Alcohol Content (BAC) Calculator calculates its result from Standard drinks, Body weight (kg), Distribution ratio r, Hours elapsed. It uses the formula BAC = (drinks × 14) / (weight × r × 1000) × 100 − 0.015 × hours elapsed; r = 0.68 (M) or 0.55 (F). Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Standard drinks, Body weight, Distribution ratio r, Hours elapsed. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Blood Alcohol Content (BAC)
- Standard drinks: 2
- Body weight: 70 kg
- Distribution ratio r: 0.68
- Hours elapsed: 2
Using Standard drinks = 2, Body weight (kg) = 70, Distribution ratio r = 0.68, Hours elapsed = 2, the calculated result is 0.0288235294.
Sample result: Calculating…
Frequently asked questions
What does the Blood Alcohol Content (BAC) calculate?
Blood Alcohol Content (BAC) Calculator Estimate blood alcohol content (BAC) using the Widmark formula. — free online calculator.
Which values should I enter?
Enter Standard drinks, Body weight, Distribution ratio r, Hours elapsed using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: BAC = (drinks × 14) / (weight × r × 1000) × 100 − 0.015 × hours elapsed; r = 0.68 (M) or 0.55 (F).
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.