Popcorn Yield Calculator
Calculate how much popped popcorn you will get from unpopped kernels.
Plan portions for movie night, parties, or bulk cooking.
Popcorn yield is the ratio of popped volume to unpopped kernel weight. When a kernel pops, water inside the starchy endosperm turns to steam and explodes the kernel, expanding it dramatically in size. The final volume depends on the popping method, kernel variety, and the moisture content of the kernels.
Typical yield ratios:
| Method | Yield (cups per oz) | Yield (cups per 100g) |
|---|---|---|
| Stovetop (oil) | 3.5–4 cups/oz | 12–14 cups/100g |
| Air popper | 4–5 cups/oz | 14–18 cups/100g |
| Microwave bag | 3–3.5 cups/oz | 11–12 cups/100g |
| Campfire / dry pan | 3–3.5 cups/oz | 11–12 cups/100g |
Why air poppers yield more: Air poppers use hot forced air with no oil, so every kernel gets evenly heated and the popped corn isn’t compressed by oil or a lid. Stovetop popping in oil coats the kernels and can compact the final volume slightly.
Standard serving sizes:
| Context | Serving Size (popped) |
|---|---|
| Single serving / snack | 1–2 cups (8–16 g popped) |
| Movie theater small | ~6 cups |
| Movie theater medium | ~10 cups |
| Movie theater large | ~16–20 cups |
| Party bowl (per person) | 3–4 cups per person |
Popping percentage: High-quality popcorn typically pops 95–98% of kernels. Older or improperly stored kernels (too dry or too moist) may leave 10–20% unpopped. Store kernels in an airtight container at room temperature; don’t refrigerate them as this draws out moisture.
Humidity effect: Kernels need about 13.5–14% moisture content to pop well. In very dry climates or if stored in a dry container, kernels can lose moisture and produce fewer, smaller, tougher-hulled pops. To restore: add 1 teaspoon of water per cup of kernels, shake, and let rest sealed for 3 days.
Calorie note: Plain air-popped popcorn contains about 31 calories per cup. Oil-popped is about 55 calories per cup. Movie theater popcorn with butter topping can reach 80–120 calories per cup.