Question: how many grams is one serving of watermelon?
Answer: Below is a listing of fruits that contain less than 15 grams in one serving: Casaba melon – One half-cup of cubed casaba melon contains 5.5g of carbs. Casaba melons are an excellent source of vitamin C and potassium. Watermelon – One half-cup of diced watermelon contains 5.5g of carbs.