Cooking a pork loin to the proper internal temperature is essential for ensuring both safety and optimal flavor. The recommended internal temperature for a cooked pork loin is 145 degrees Fahrenheit (63 degrees Celsius), as measured by a meat thermometer inserted into the thickest part of the meat.
The cooking time for a pork loin will vary depending on its size and thickness. As a general rule of thumb, you should cook a pork loin for about 20 minutes per pound at 400 degrees Fahrenheit (200 degrees Celsius). So, for example, a 3-pound pork loin would take about 60 minutes to cook. It is always a good idea to use a meat thermometer to ensure that the pork loin has reached the proper internal temperature before removing it from the oven.