How Many Calories in a Submarine Bun?
                                
                                
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                                    4 min read                                
                            
                                According to nutritional data, a standard 6-inch white submarine bun contains approximately 204 calories, while a 12-inch can have over 400. The total calorie count for your sub sandwich depends significantly on the bun, and a deep dive into the types of submarine buns available can help you make more informed decisions about your meal.