Plain vodka has no sugar. One fluid ounce of plain vodka has 64 calories, and all come from alcohol. A 1-ounce serving of vodka contains about 9 grams of alcohol and 18 grams of water, with no other significant nutrients.
Certain alcoholic beverages, such as rum and whiskey, also contain no sugar. However, beer typically has 10 to 15 grams per pint. Light beers have less, while heavier ones such as stouts and porters have about 20 grams. Dry wines have little sugar, with 1 or 2 grams in about 7 ounces. Moderately sweet wines run 5 to 10 grams of sugar per medium-size glass, while sweet wines sometimes exceed 10 grams.