Whether you are comparison shopping, need the dimensions for installation or trying to figure out if that 20 lb turkey will fit it is helpful to know the dimensions and capacity. While you wait for the expert to answer, you can check the links below if you wish. The first link is the installation instructions with dimensions if that is your goal. The second link shows you how to figure the cu ft for the microwave. As for the turkey,---don't do it! I attached the links below. Hope this helps!