The Big Mac with cheese contains 550 calories. If you get the meal with medium fries (410 calories) and drink (200 calories) you are getting 1160 calories in just one meal! Go with the large an you’re up to 1360. That’s more calories in on meal than some people eat in a whole day! You’d only have to eat 3 large meals to rack up 3,500 calories to gain a pound of fat.