Calories In Homemade Potato Soup Calories: 326, Fat: 10g, Carbs: 71g, Protein: 28g, Fiber: 6g. Calories In homemade potato soup Calories: 318, Fat: 11g, Carbs: 50g, Protein: 7g, Fiber: 6g. Calories In Grandma's homemade potato soup Calories: 94, Fat: 5g, Carbs: 11g, Protein: 3g, Fiber: 1g.