Baked potato soup is very delicious and I could live off of that stuff.
Anyway to answer your question the amount of calories in a cup of baked potato soup will depend on the size of the cup you have the baked potato soup in as well as what ingredients you have in it.
But if you have some plain baked potato soup a full cup usually contains between 190 to 210 calories per cup of baked potato soup.
Now if the cup of baked potato soup contains bacon and cheddar cheese like I eat my baked potato soup then the calories go up to 430 calories per cup.