Alcohol Calculator
Enter what you drank and see total alcohol units, calories consumed, and estimated BAC. Track your intake with our free alcohol calculator.
⚠️ Educational Tool Only — Never Drink and Drive
This calculator is for educational purposes only and provides estimates based on averages. Actual BAC depends on many individual factors. Never rely on a calculator to determine if you are safe to drive. If in doubt, don't drive. Call a rideshare, taxi, or designated driver.
How It Works
Add each drink you've consumed by selecting the type, size, and ABV%. The calculator converts each drink to standard alcohol units (one unit = 14g or 0.6 fl oz of pure alcohol), calculates calories (alcohol has 7 calories per gram, plus carbohydrate calories from mixers/beer), and estimates your BAC using the Widmark equation. You can add multiple drinks over different time periods to see cumulative effects.
Frequently Asked Questions
What is a standard alcohol unit?
In the US, one standard drink contains 14 grams (0.6 fl oz) of pure alcohol. This equals: 12 oz of regular beer (5% ABV), 5 oz of wine (12% ABV), or 1.5 oz of distilled spirits (40% ABV).
How many calories are in alcohol?
Pure alcohol contains 7 calories per gram. A standard beer (~150 cal), glass of wine (~120 cal), or shot of spirits (~100 cal). Mixed drinks can contain 200-500+ calories due to added sugars and mixers.
How many drinks is too many?
The CDC defines moderate drinking as up to 1 drink per day for women and up to 2 drinks per day for men. Binge drinking is defined as 4+ drinks for women or 5+ drinks for men within about 2 hours.