I just checked a frozen pizza my brother and I are going to split. It's roughly 1050 calories for the whole thing so 525 calories for each of us. It's a good thing I skipped breakfast and did plenty of yard work today. :/ This is a thin crust sausage pizza with a moderate amount of cheese vs most others and its 12". I'd say those large pizzas are a minimum of 2000 calories depending n the cheese and if oil was added to the dough. That's before adding toppings and drinks.