This varies with how many other side dishes or buffet dishes you are serving. The weights below refer to raw potatoes. As a side dish alone: 3 potatoes or 1/3 lb (150 g) per person As a side dish with 1 or more other sides: 2 potatoes or 1/5 lb (90 g) per person As part of a smaller buffet: 2 potatoes or 1/5 lb (90 g) per person As part of a larger buffet: 1 potato or 1/10 lb (45 g) per person