Health & Fitness
Blood Alcohol Content (BAC)
Simplified Widmark-style estimate (%).
Educational estimates only. Not medical, legal, tax, or financial advice.
Guide: Blood Alcohol Content (BAC)
What it does
Approximates BAC using a simplified ethanol distribution model.
How to use it
Enter number of standard drinks, body weight, sex, and time since first drink.
Formula
Widmark-style: alcohol mass divided by body water volume, adjusted by metabolism over time (simplified constants).
Example
Two standard drinks in one hour may produce a different BAC than the same drinks spread over three hours.
FAQs
Can I use this to decide if I can drive?
No. Never rely on this for legal decisions. Use a certified breathalyzer and follow local laws.
Why do estimates vary?
Food, medications, tolerance, and health affect BAC; models are averages only.
What is a standard drink?
Roughly 14 g ethanol in US definitions (e.g., ~12 oz beer, 5 oz wine, 1.5 oz spirits).