How Many Calories are in a Big Mac?

If you are buying a big mac in the United States you will be purchasing a burger with 560 calories. It is said that this calorie count changes according to what country you are in. If an average person should eat around 1500 calories a day then a big mac should be over 1/3 of the average persons daily food intake, after french frys and a drink it would probably be closer to 1/2.