A large tub of popcorn from AMC Movie Theaters weighs in at 157 grams and has 1,030 calories. Included in those calories are 41 grams of fat and 579 milligrams of sodium.
According to WebMD, a large tub of movie theater popcorn packs the recommended daily amount of fat into one sitting. When movie theaters offer the popcorn in combos that add soda and candy, viewers can consume a day's worth of calories and up to three days' worth of fat in a sitting. Because of the low nutritional value of popcorn, soda and candy, nutrition experts call these empty calories. Adding butter and salt to the popcorn only makes the snack's fat and sodium content skyrocket.