Answer by  
                                                                                          PZ (1206)
                                                            
                          
                          
                                                          One medium-sized baked sweet potato has about 130 calories. Sweet potatoes are high in dietary fiber and a good source of iron, potassium, manganese and vitamins A and C. Because sweet potatoes have a low glycemic index rating, most carb-counting diets recommend substituting them for white potatoes or rice.