How many calories in a 12 oz brewed coffee? A complete guide
                                
                                
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                                    4 min read                                
                            
                                A standard 12 oz cup of plain, black, brewed coffee contains fewer than 5 calories, a remarkably low number that makes it a favorite for many on a diet. This low-calorie base is easily transformed, however, as the real calorie counts accumulate from the common additions of milks, syrups, and sweeteners.