Is this legal advice?
NO. This is a rough estimate only. Real BAC depends on food intake, genetics, medications, and individual metabolism. Never drink and drive.
Calculator
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Analysis
Interpretation of the current calculator output
Enter values to see detailed analysis and insights.
How to Use
Step-by-step instructions
- 1Enter your weight (lbs).
- 2Select your gender.
- 3Enter the number of standard drinks (12oz beer, 5oz wine, 1.5oz spirits).
- 4Enter the time elapsed since first drink.
- 5The calculator will estimate your BAC.
Widmark Formula
Estimates BAC based on alcohol mass, body weight, gender-specific distribution ratio (r), and metabolic rate over time.
BAC = (Alcohol / (Weight x r)) x 100 - (0.015 x Hours)Variables:
r0.68 (Men), 0.55 (Women)0.015Average elimination rate per hourExample
2 Drinks in 1 Hour
Inputs:
Weight:160 lbs
Gender:Male
Drinks:2
Time:1 hr
Steps:
- 1.Alcohol = 28g
- 2.Weight = 72574g
- 3.BAC = (28 / (72574 * 0.68)) * 100 - 0.015
- 4.BAC = 0.057 - 0.015 = 0.042%
Result:
0.042%