Calculate standard drinks
%
Estimated U.S. standard drinks1.0
Each U.S. standard drink contains about 0.6 fl oz (14 g) of pure alcohol.
Formula
How the standard drink calculation works
Servings × fluid ounces × ABV as a decimal ÷ 0.6
In the United States, one standard drink contains about 0.6 fluid ounces or 14 grams of pure ethanol. A large or high-ABV pour can contain more than one standard drink.
Common standard-drink examples
| Beverage | Serving | Approximate standard drinks |
|---|---|---|
| Regular beer | 12 oz at 5% ABV | 1.0 |
| Wine | 5 oz at 12% ABV | 1.0 |
| Distilled spirits | 1.5 oz at 40% ABV | 1.0 |
| Strong beer | 16 oz at 8% ABV | 2.1 |
The result estimates ethanol content, not impairment or an EtG concentration. Use the number as an input in the EtG calculator, then review our methodology and limitations.