A classic martini recipe calls for 3.0 fl oz of 40% ABV gin. How many standard drinks are in one martini?

Two standard drinks.

One standard drink, because cocktails are counted as single servings regardless of recipe.

Three standard drinks, since most cocktails contain at least three measured pours by bartenders.

0.5 standard drink, because dilution from ice reduces the effective alcohol content below the standard drink threshold.