There are about 30 grams of carbohydrates in a serving of popcorn. A serving of popped popcorn is roughly 4 to 5 cups popped, which is the amount you get from 2 tablespoons of unpopped kernels. A serving of air-popped popcorn contains about 120 to 150 calories.Click to see full answer. Then, how many net carbs are in movie popcorn?Depending on your daily carb limit, popcorn may be able to fit into a keto diet. A typical serving of air-popped popcorn is 3 cups (24 grams) and contains 4 grams of fiber and 18 grams of carbs — or 14 grams of net carbs ( 7 ).Also, how many calories are in a small movie Theatre popcorn? 225 calories Then, how many carbs are in a small cinema popcorn? Nutrition Information Calories 169 (707 kJ) Saturated Fat 5.5 g 23% Carbohydrate 18.9 g 6% Sodium 353 mg 15% Alcohol 0 g Is movie theater popcorn Keto friendly?Air-popped popcorn has been a healthy snack option for many people, but it is not allowed on the keto diet since it is a grain and especially high in carbohydrates. If you are looking for a salty crunch similar to popcorn, no worries! You can give pork rinds or a veggie chip a try!