How many calories are in one pat of real butter?
                                
                                
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                                    6 min read                                
                            
                                According to USDA data, one standard pat of butter, which measures about one inch square and one-third of an inch high (5 grams), contains approximately 36 calories. This seemingly small dollop of real butter, often enjoyed on toast or vegetables, packs a surprising amount of energy and is almost entirely made of fat.