How many ounces of wine equivalent to a standard serving contains 12% alc./vol.?

A standard serving of wine is typically defined as containing about 5 ounces, which aligns with the typical alcohol content of around 12% alcohol by volume (alc./vol.). This measurement is rooted in the standard drink definition used in many guidelines, which state that a standard drink contains approximately 0.6 ounces of pure alcohol.

To break it down, a 5-ounce serving of wine at 12% alc./vol. contains about 0.6 ounces of pure alcohol (5 oz x 0.12 = 0.6 oz). This consistency is crucial for understanding servings, as it allows for the monitoring of alcohol intake.

The other options do not align with the standard measurement. A serving of 3 ounces would contain only about 0.36 ounces of pure alcohol, significantly less than a standard drink. Similarly, 7 ounces would exceed the standard drink definition and would contain 0.84 ounces of pure alcohol, and 4 ounces, while closer, would still not match the commonly accepted serving size, which is clearly recognized as 5 ounces. Therefore, the 5-ounce serving reflects the standard measurement used for wine consumption guidelines.