Like what we have mentioned above, sweet potato has low calories, because based from USDA Nation Nutrient data base, in every 100 gr baked sweet potato (in skin) contained 90 calories or equal to 376 kJ. According to calorieking site, to burn those calories, you only needs to do activities such as swimming for only 7 minutes, or jogging for 10 minutes, or cycling for 14 minutes. If you prefer walking, it will takes a little longer time, approximately 25 minutes.