According to the USDA National Nutrient Database, un-popped popcorn kernels contain 105 calories per ounce. Unpopped popcorn has slightly more calories than cooked popcorn kernels, according to The Popcorn Board.

Although Cineworld Cinemas did not, as of 2010, publish nutrition information for the products in its concessions, several news stories provided insight into their calorie content. Use nutritional information to help you make smarter snacking choices.

Popcorn is a delicious low-fat, low-calorie food that is a popular snack to munch on while watching your favorite movie or to stave off hunger pangs in between meals. According to the Popcorn Board, just three cups of popcorn equal one serving of whole grains.

Movie theaters are known for serving overpriced popcorn in inordinately large servings. While the number of calories in the buckets of popcorn from different movie theaters may vary in calorie count, the standard number of calories in 1 cup of oil-popped popcorn without butter is 55, according to the U.S.

Popped using butter or coconut oil, AMC movie theaters' popcorn contains a high percentage of calories from fat. The Center for Science in the Public Interest, or CSPI, declared AMC one of the nominees for "Best Supporting Actor in the Obesity Epidemic."

According to the Orville Redenbacher website, its microwave popcorn is 100 percent whole grain and has no trans fats. Several of the popcorn flavors are available in mini bags -- single-serve, 1.2 oz bags.

Although popcorn can be a healthy choice -- it's a whole grain that's packed with fiber -- the plain version is friendlier for your waistline than caramel popcorn. Caramel is made from sugar, and adds empty calories to your snack, providing no benefit besides taste.

Popcorn can be a healthy, filling snack if it is prepared correctly. While microwave popcorn often gets a bad rap, Smart Pop popcorn is a low-calorie, healthy alternative to other, less sensible, brands of microwave popcorn.

Popcorn is such a popular treat that Foods.com lists 386 recipes using it. Most popcorn lovers have a favorite way to enjoy it, whether it’s caramel corn, kettle corn, chocolate covered corn, or just plain old popcorn.

The unique sweet and salty flavor of kettle corn has made it a sought-after treat at fairs and outdoor festivals everywhere. Because of its popularity, the sweet and savory snack is also available in many grocery stores in either a pre-popped form or a microwave-ready version.

It’s probably safe to assume that the average American enjoys popcorn -- the whole-grain snack is consumed at a per-capita rate of about 200 cups a year, according to the U.S. popcorn industry. At its best, popcorn is low in calories and fat, a good source of dietary fiber and virtually sodium-free.