What's the serving size of a McChicken? A complete breakdown
                                
                                
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                                    3 min read                                
                            
                                According to official US nutrition information, the standard McChicken sandwich contains 390 calories. Beyond its caloric impact, understanding what's the serving size of a McChicken is key for anyone tracking their diet, and that measurement can actually vary depending on where you are in the world.