One of the first things that many people consider when buying a freezer is its size. The size of your freezer is basic but extremely important information. The outer dimensions determine how much space you'll need to store the freezer. The inner dimensions determine the freezer's capacity in terms of how much food storage you will have. Figuring out the size of a freezer is a matter of performing a series of simple measurements and mathematical calculations.
Measure the height of the freezer from top to bottom with a tape measure.
Measure the width from side to side.
Measure the depth from back to front.
Perform these measurements with all doors on the freezer closed.
Remove any drawers, trays or shelves that will come out of the freezer.
Measure the height, depth and width of the freezer from the inside. Use a tape measure and measure in inches.
Multiply these three measurements together. For instance, if you have a freezer that is 72 inches tall, 24 inches wide and 36 inches deep, you would multiply these figures to get 62,208.
Divide your answer from step three by 1,728 to find the volume in cubic feet. In this example, you would divide 62,208 by 1,728 to get 36 cubic feet.