how many carbs in grapes
1 4 grams of carbohydrate in 10 American slip skin grapes. 2  8 grams of carbohydrate in 20 American slip skin grapes. 3  28 carbs in 1 cup of regular grapes such as Thompson. 4  15.8 carbohydrates in 1 cup of American slip skin grapes.
1 20 grams of carbohydrate in 4 oz, or 114g, of European type grapes such as Thompson seedless. 2  40 grams of carbohydrate in 8 oz, or 227g, of European type grapes such as Thompson seedless.