What is considered a single serving of coffee? Deciphering Your Brew
                                
                                
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                                    4 min read                                
                            
                                According to the U.S. Department of Agriculture, an average 8 oz cup of brewed filter coffee contains 96 milligrams of caffeine. This seemingly simple metric can be confusing, however, as **what is considered a single serving of coffee?** depends heavily on context, brewing method, and the mug you're drinking from.