What is the standard drink size of Vodka (mL)?

• A. 34 mL
• B. 313 mL
• C. 32 mL
• D. 268 mL

Answer: (A)

A standard drink is a amount of beverage that contains about 10 grams of pure alcohol. For vodka at 40% ABV, the drink contains 0.40 times its volume as ethanol. Using a typical density for ethanol, the volume needed to reach roughly 10 g of alcohol works out to about 31–32 mL. In many educational resources this is rounded to about 34 mL to keep the figure simple for students. So, 34 mL is the rounded amount used in this context to represent a standard drink of vodka. The other options are either far too large to be a single standard drink or, in the case of a slightly smaller value, would be below the rounded standard used in these materials.