How many calories in a small Regal popcorn with butter?: A Deep Dive
                                
                                
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                                    5 min read                                
                            
                                According to the Center for Science in the Public Interest (CSPI), a small Regal popcorn has approximately 670 calories, with the optional "buttery" topping adding another 130 calories per tablespoon. This surprising calorie count, equivalent to a personal pan pizza, can have a significant impact on your daily nutritional intake.