What this calculator does
Popcorn yield works out popped popcorn volume from a quantity of unpopped kernels, and servings it makes. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaPopped volume = kernel volume × expansion factor (roughly 30 to 40 times, by kernel type)
The inputs explained
| Field | What to enter |
|---|---|
| Unpopped kernels (cups) | A number, measured in cups. Starts at 0.5. |
| Kernel type | Choose from Mushroom (≈30×), Mixed / average (≈35×), Butterfly / snowflake (≈40×). |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with unpopped kernels
Every other input is held at the calculator’s starting values while unpopped kernels varies. Select any row to load that scenario into the calculator.