Calories in Popcorn (air-popped)

31kcal per 1 cup, popped (8 g)

387 kcal per 100 g · about 2% of a 2,000-kcal day

Air-popped popcorn is only 31 calories per cup — the whole-grain snack that fills a bowl. Movie-theater butter changes that math entirely.

Popcorn (air-popped) nutrition facts

NutrientPer 100 gPer 1 cup, popped
Calories387 kcal31 kcal
Protein12.9 g1 g
Carbs77.8 g6.2 g
Fat4.5 g0.4 g
Fiber14.5 g1.2 g
Sugar0.9 g0.1 g

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Values based on USDA FoodData Central reference entries. Actual nutrition varies with variety, preparation, and portion. © 2026 NibbleCal.