Convert popcorn kernels to popped volume and servings, with oil and salt for stovetop popping.
Guide: about 33 ml of popped corn per gram of kernels. Oil is about 1 tablespoon per 50 g of kernels for stovetop popping; air poppers need none.
Popped volume
How to use this tool
Weigh the unpopped kernels in grams.
Stovetop needs oil; air poppers need none; microwave bags follow the packet.
Volume is about 33 ml per gram, and a serving is about 1 litre of popped corn.
Salt and flavourings stick better to hot, lightly oiled popcorn.
Formula & worked example
100 g of kernels pops to about 3.3 litres, or 3.3 servings, needing 2 tablespoons of oil on the stove and about 1 g of salt.
Limitations — read this before you rely on it
Popping yield varies by kernel variety, freshness and heat: old or damp kernels pop less, and about 5% typically stay unpopped.
Frequently asked questions
About 3.3 litres, or roughly 13 cups — enough for 3 generous servings.
About 1 tablespoon per 50 g of kernels, heated until a test kernel pops before adding the rest.
They may be old, damp or cracked; fresh kernels in a sealed container pop best.
Yes, gram for gram, since it adds no oil — but toppings and salt still count.
About 1 litre of popped corn per person is a generous serving.