How Much Popcorn Is 1 Calorie? The Surprising Math of This Light Snack
                                
                                
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                                    4 min read                                
                            
                                According to the Popcorn Board, air-popped popcorn contains only about 30 calories per cup, making it one of the most satisfyingly low-calorie snack options available. This leads many to wonder, specifically, how much popcorn is 1 calorie and if it is possible to eat a single kernel for less than a calorie.