What is one portion of popcorn and how is it measured?
                                
                                
                                •
                                
                                
                        
                                    
                                    3 min read                                
                            
                                According to the USDA, a standard serving of air-popped popcorn is 3 cups and contains about 100 calories before any toppings are added. Understanding what is one portion of popcorn is crucial for managing calorie intake and enjoying this whole-grain snack as part of a balanced diet. This article breaks down the different ways to measure a portion, its nutritional value, and compares healthy vs. unhealthy preparations.