In the United States, a standard drink contains 0.6 fluid ounces or 14 grams of pure alcohol.
One standard drink is equal to:
- 12 fl oz of regular beer
- 8-9 fl oz of malt liquor
- 5 fl oz of table wine
- 1.5 fl oz shot of 80-proof distilled spirits (gin, rum, tequila, vodka, whiskey, etc.)
This calculator uses the Widmark formula, a widely accepted scientific method for estimating BAC.
Alcohol is eliminated from the body at an average rate of 0.015% BAC per hour, though this varies between individuals.
Your actual BAC may be higher or lower than this estimate. More information on the accuracy of online BAC calculators can be found on the How Accurate Are Online Blood Alcohol Calculators post.
Always choose a safe and sober ride. Never rely on a calculator to determine whether it is safe to drive.
Blood Alcohol Content Calculator
Use this tool to estimate your current blood alcohol content (BAC) based on the number and type of drinks you consumed, your body weight, your sex at birth, and the amount of time that has passed since your last drink. This calculator provides an estimate only. Individual BAC levels vary based on many factors including food intake, medications, hydration, health conditions, tolerance, and metabolism. Do not use this tool to determine your ability to drive, operate machinery, or make safety-related decisions.
How to Use
1. Enter your body weight.
2. Select your sex at birth (used to determine the alcohol distribution ratio).
3. Enter how many beers, wines, and spirits you consumed.
4. Enter how many hours it has been since your last drink.
5. Click Calculate to see your estimated BAC and the approximate number of hours until your BAC returns to zero.
Estimated BAC: 0.00%
Approximate hours until 0% BAC: 0 hour(s)
