The calorie count in popcorn varies  significantly based on its preparation  

and added flavors. Plain, air-popped  popcorn has roughly 31 calories per cup. 

However, microwave popcorn,  especially when butter-flavored,  

can contain 300 to 500 calories per  bag due to added oils and flavorings. 

Flavored popcorn, like caramel or  cheese, sees an increased calorie count,  

with caramel glazed popcorn ranging from 120 to  150 calories per cup, and cheese-flavored popcorn  

around 100 to 130 calories per cup, depending  on the flavor intensity and added ingredients. 

Gourmet varieties, including those with chocolate  or nuts, can have even higher calorie counts,  

potentially over 200 to 300 calories per cup. A medium-sized bag (about 50 grams) of this kind  

of popcorn could range from 250 to 400 calories. Nutritional information on the package provides  

the most accurate calorie count so  for accurate calorie assessment,  

checking the nutritional information is advisable,  as it varies widely between brands and flavors.