How many calories are in a 4 oz pork roast? It Depends on the Cut
                                
                                
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                                    4 min read                                
                            
                                According to nutritional data, a 4-ounce serving of lean pork tenderloin contains approximately 162 calories, but this can change dramatically based on the cut of meat. The number of calories in a 4 oz pork roast depends heavily on whether it's a lean cut like the tenderloin or a fattier cut like the shoulder.