What is the standard drink measurement for beer?

The standard drink measurement for beer is conventionally defined based on the alcohol content and volume of the beverage. In many regions, including the United States and Australia, a standard drink of beer is typically defined as containing about 10 grams of pure alcohol. This usually corresponds to a volume of around 300ml for regular beer, which has an alcohol content of approximately 4% to 5% by volume.

This measurement provides a consistent way to gauge alcohol intake, allowing consumers to track their consumption across different types of alcoholic beverages, including beer, wine, and spirits. Therefore, the choice of 300ml aligns with the standard drink definition commonly used in various guidelines to promote responsible drinking and public health awareness.