How Many Calories Are in 24 oz of Diet Coke? The Zero-Calorie Truth
                                
                                
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                                    4 min read                                
                            
                                According to the Coca-Cola company and various nutrition databases, 24 oz of Diet Coke contains zero calories. This is because the beverage is sweetened with artificial sweeteners rather than sugar, which is the source of calories in regular soft drinks.