is a yam a carbohydrate
Carbs in Yam. The favorite choice for the term Yam is 1 cup of cubed Yam which has about 40 grams of carbohydrate. The total carbohyrate, sugar, fiber and estimated net carbs (non-fiber carbs) for a variety of types and serving sizes of Yam is shown below. Popular Serving Sizes of Yam.