What is the standard drink size of Moscato (White Wine)?

• A. 90 mL
• B. 208 mL
• C. 101 mL
• D. 570 mL

Answer: (B)

Think about a standard drink as a fixed amount of pure alcohol, about 10 grams. To figure out how much Moscato counts as one standard drink, you adjust for how strong the wine is. Moscato usually has a low alcohol content, around 6% ABV. That means each milliliter of Moscato contains roughly 0.06 × 0.789 g of ethanol (about 0.047 g per mL). To reach 10 g of ethanol, you need 10 ÷ 0.047 ≈ 212 mL. That puts the standard drink size for Moscato close to 208 mL, which matches the typical serving size for a single standard drink of this type. So, because Moscato’s alcohol content is lower than many other wines, you need a bit more volume to reach 10 g of alcohol, explaining why the standard drink size is around 208 mL. The other options would either under- or over-shoot the 10 g mark given Moscato’s usual ABV.