Eli5 calories calculation?

Question

Hello! Why is my popcorn has 90 calories for 1 cup, but 260 for 3? Where are the 10 calories missing? Thank you 🙂

In: 1

Answer 1

It’s just rounding. The exact number might be closer to, oh, 88 calories. For 1 cup they round it to 90.

But for 3 cups it should be 264, and they can round it to 260.