Air-popped popcorn is a whole grain with about 31 calories a cup; butter and caramel coatings raise that two to four times. Movie-theater “small” buckets are often 8–11 cups.
How to use the Popcorn Calculator
- Number of people
- Portion per person
- Custom cups per person
- Type
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter the number of people, the portion size and the type of popcorn.
Inputs explained
| Field | What to enter |
|---|---|
| Number of people | A number |
| Portion per person | Choose one: Snack – 2 cups, Movie night – 3 cups, Theater small – 9 cups, Theater medium – 14 cups … |
| Custom cups per person | A number |
| Type | Choose one: Air-popped, Oil-popped, Microwave, butter, Microwave, cheddar … |
What each result means
- Kernels to pop = [Popped popcorn]÷32
- Kernel weight = [Kernels to pop]÷236.5882365×190
Example values
How the main result changes when Number of people changes and everything else stays at the example values above:
| Number of people | Kernels to pop (cups) |
|---|---|
| 3 | 0.28 |
| 4.5 | 0.42 |
| 6 | 0.56 |
| 7.5 | 0.7 |
| 9 | 0.84 |
| 12 | 1.12 |
Formula
Popped popcorn = people × cups per person
Kernels = popped ÷ 32 (1 tbsp kernels ≈ 2 cups popped; ½ cup kernels ≈ 16 cups)
Calories = popped cups × calories per cup
Worked example
Inputs — Number of people: 6; Portion per person: Movie night – 3 cups; Type: Air-popped.
Results — Popped popcorn = 18 cups; Kernels to pop = 0.56 cups; Kernel weight = 107 g; Calories per person = 93 kcal.
Frequently asked questions
How much popcorn does ½ cup of kernels make?
About 16 cups (4 quarts) of popped popcorn.
How much popcorn per person?
About 2–4 cups for a snack or movie night.
How many calories are in popcorn?
About 31 kcal per cup air-popped and 40–60 with oil or butter.