Question: how many kcals are in 4 grams of sugar?
Answer: Sugar is a source of carbohydrate and energy. It provides 4 calories per gram or 16 calories in a level teaspoon (4 g). This compares to 36 calories for the same amount (4 g) of fat or oil (e.g., butter, margarine, canola oil). On its own, sugar has no other nutrients.