How many calories are in a 12 inch stromboli? Answering the Nutrition Facts
                                
                                
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                                    5 min read                                
                            
                                A 12-inch, three-meat stromboli from a chain restaurant like Sbarro can contain nearly 2,000 calories. Knowing exactly how many calories are in a 12 inch stromboli, however, depends heavily on the ingredients and preparation method. This article breaks down the caloric content of various popular stromboli types.