How many calories in
popcorn?
Air-popped popcorn is one of the lightest snacks per volume — about 31 calories per cup popped. The 100g number looks high because popcorn is mostly air; you'd need a stadium tub to eat that much. Movie-theater popcorn is a different food entirely thanks to oil and butter, often hitting 1,200+ calories for a large.
Common serving sizes.
Calories scale with portion. Here's how a typical popcorn serving translates in your tracker:
What 387 calories means.
Carb-forward — most of its 387 kcal come from carbohydrate, so it's best placed around training when your body uses carbs most readily.
Skip the lookup. Snap the plate.
Point your iPhone camera at popcorn and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreQuick answers.
How many calories in popcorn?
Popcorn has approximately 387 calories per 100g (air-popped). A typical serving — 1 cup, air-popped (8g) — comes in at 31 calories.
How much protein is in popcorn?
13g of protein per 100g (air-popped). That puts popcorn at roughly 3.4g of protein per 100 calories — a useful lens when comparing to other snacks sources.
How do I log popcorn accurately?
The simplest method: weigh it on a kitchen scale, then enter grams in your tracker. With Spotwell, you can skip the scale — point the camera at the plate and the AI estimates the portion in under a second. Adjust the value if it looks off.
Is popcorn good for weight loss?
It depends on your overall calorie target. Popcorn sits in a moderate calorie range. It can fit any goal — weight loss, maintenance, or muscle gain — when portioned to your daily target.