how many calories does mash potatoes have
1 252 calories in 8 ounces, or 227g, of mashed potato. 2  237 calories in 1 cup of mashed potato (7.4 ounces, or 210g) 3  If you add more butter, oil or margarine, the calorie content will be higher:  20 calories in a small pat of butter (0.1 oz or 3g )