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1 When baking more than one potato, choose potatoes that are the same size, so they finish baking at the same time.  Preheat the oven (see table below). You can bake your potatoes at different temperatures, ranging from 400 degrees Fahrenheit (204.4 degrees Celsius) to 325 degrees Fahrenheit (162.7 degrees Celsius).
Place the potato directly on the oven rack. Bake for 40 to 60 minutes, depending upon the size of the potato. Potatoes are as hard as a brick when they are raw. By the time itâs cooked youâll be able to squeeze it.