2. Generally speaking, per100g of dry sweet potato powder contains about 337 calories, while per100g of dry rice flour contains about 349 calories, so the heat burden brought to human body by eating them is similar, and rice flour may be slightly higher. Rice flour and sweet potato flour are easy to add more oil and salt in the cooking process, and these seasonings will bring more calories, so if you are a dieter, it is recommended to be light.