Blood Alcohol Content Estimate
Estimate your blood alcohol concentration (BAC) using the Widmark formula. Provide how many standard drinks you've consumed, your body weight, and hours since drinking began.
For educational use only. Do not use to determine legal intoxication.
Examples
- 3 drinks, 80 kg, 2 hrs ⇒ 0.047%
- 5 drinks, 70 kg, 1 hr ⇒ 0.132%
- 2 drinks, 90 kg, 3 hrs ⇒ 0.001%
FAQ
What is a standard drink?
Typically 12 oz beer, 5 oz wine, or 1.5 oz of 40% liquor.
Why multiply by 14?
It converts the number of drinks into grams of alcohol for the Widmark formula.
What does 0.015 represent?
An average alcohol elimination rate per hour.
Is this calculation exact?
No. Individual metabolism and drink strength vary widely.
Additional Information
- One standard drink contains about 14 grams of pure alcohol.
- Average metabolism removes roughly 0.015% BAC per hour.
- Factors like sex, food intake, and health can change actual BAC.