The amount of time required to cook roast pork in the oven is calculated by multiplying weight in pounds by cooking minutes. For example, an 8-pound pork shoulder roast needs to cook for 23 to 25 minutes per pound to reach a minimum internal temperature of 165 degrees Fahrenheit.
Pork roast cooking time charts display ideal cooking times for various cuts of pork. Cooking charts show the type of pork cut, average pound weight, cooking temperature, internal meat thermometer temperatures and number of minutes per pound the roast must cook. A meat thermometer is inserted into the meat to get internal temperature readings, and another reading is taken five minutes after the roast is removed from the oven. Pork roast internal temperatures determine whether the meat is cooked to medium texture or well done. Typically, the meat thermometer is inserted into the thickest area of the meat and removed immediately after a reading, but some digital meat thermometers are designed to remain in the meat during cooking.
Choosing what size of pork roast to buy requires knowing how many people need to be served. The average pork roast serving is 3 ounces per person, and 4 ounces of raw, boneless pork is required to produce a 3-ounce serving of cooked pork.