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Plain popcorn calories

Plain popcorn, air-popped, no butter
31kcal
1 cup · 8 g, air-popped, no butter
13%protein
1 gProtein
6 gCarbs
0.4 gFat
How to burn off 31 kcal
—Walking, brisk
—Jogging
—Cycling, moderate
—Swimming
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Nutrition facts
Air-popped, no butter · per 8 g
Calories31 kcal
Protein1 g
Carbohydrate6.2 g
Fat0.4 g
Saturated fat0.1 g
Cholesterol0 mg
Sodium1 mg
Potassium26 mg
Iron0.3 mg

Source: USDA FoodData Central

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Verified nutrition data

Numbers on this page come from USDA FoodData Central, the U.S. Department of Agriculture’s food composition database, and from manufacturer labels where a branded product is named. Last verified September 2026. How we verify our data →

Most popular plain popcorn brands in the United States
Ranked by popularity in the BodyPal database
#  Productkcal / 100 g
1Whole Foods Market Plain Popcorn3.5 cup · 30 g467 kcal

Bagged plain popcorn is popped in oil, so label numbers run higher than the air-popped figures above.
Source: manufacturer labels / USDA FoodData Central.

Similar foods
Calories per 100 g
Popped PopcornPopped Popcorn387 kcal / 100 gMicrowave PopcornMicrowave Popcorn535 kcal / 100 gMovie Theater PopcornMovie Theater Popcorn603 kcal / 100 g

More snacks & treats → All calorie guides →

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Plain popcorn FAQs
How many calories are in a cup of plain popcorn?

About 31 calories in one cup of air-popped plain popcorn (8 g). A 3-cup bowl comes to 93 calories.

Is plain popcorn good for weight loss?

Plain popcorn is 387 calories per 100 g, but a cup weighs only 8 g, so a 3-cup bowl is 93 calories with 3.5 g of fiber.

Plain popcorn vs microwave popcorn: which has fewer calories?

Air-popped plain popcorn is 387 calories per 100 g, while plain microwave popcorn is 518 because it pops in oil. Per cup that is 31 calories against 57.

How much protein and fiber are in plain popcorn?

100 g has 12.9 g protein and 14.5 g fiber. One cup (8 g) has 1 g protein, 1.2 g fiber and 6.2 g carbs.