Potato soup made at home can contain as much as 430 calories per serving depending on what you add to the potato soup.
The more ingredients and things you add to make the potato soup more flavorful the more calories it will have.
If you make just plain potato soup the calories should be as low as 190 to 210 calories but when you add things such as bacon, Cheddar Cheese etc then the calories will increase to around 400 to 430 calories.