Unless you are a devoted athlete like pizzeria owner and cycling enthusiast Matt McClellan, originator of the Pizza Diet, you probably shouldn't make pizza your only food. The occasional treat is tasty, but you will pay the price in fat and calories.
One slice of Papa John's cheese pizza ranges from 180 calories to 300 calories per slice, depending on the size of the pizza, according to online calorie counter MyPlate. A single slice has 9 to 18 percent of the daily recommended value of fat, based on a 2,000 calorie diet.
The Works Pizza has sausage, pepperoni, ham, onions, green peppers, olives and mushrooms. Calorie counts range from 210 to 350 calories per slice, depending on the size of the pizza. Fat content ranges from 9 g, or 14 percent of the daily recommended value, to 15 g, or 23 percent.
Papa John's nutrition tables present serving sizes as being one slice. Papa John's pizza weighs from fewer than 3 oz. to about 4 ½ oz. per slice. Chances are, you eat more than one slice of pizza. A two-slice meal of pizza has 360 to 700 calories, and a three-slice meal has 540 to 1,050 calories. If you eat all four slices of their cheese Pizza for One, you get 720 calories.