How Many Calories Are in One Whole Red Onion?
                                
                                
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                                    3 min read                                
                            
                                According to the USDA, a medium red onion contains approximately 44 calories. This low-calorie vegetable is a flavorful addition to countless dishes, but the exact calorie count can vary depending on its size and how it is prepared. Understanding how many calories are in one whole red onion is key for anyone watching their intake.