The favorite choice for the term "Fruit Cocktail" is 1 cup of Peach Pineapple Pear Grape Cherry Fruit Cocktail (Solids and Liquids, Water Pack, Canned) which has about 20 grams of carbohydrate.
The total carbohyrate, sugar, fiber and estimated net carbs (non-fiber carbs) for a variety of types and serving sizes of Fruit Cocktail is shown below.