How many calories are in a bag of microwave salted popcorn?
                                
                                
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                                    4 min read                                
                            
                                A single standard-sized bag of microwave salted popcorn can contain upwards of 400 calories, a fact that surprises many who assume it is a light snack. Understanding precisely how many calories are in a bag of microwave salted popcorn requires a closer look at serving sizes, added ingredients, and preparation methods.