Open the door of the freezer and remove any food inside.
Measure the length of the inside of the freezer from one side wall to the other. Write down the measurement in inches.
Measure the height of the inside of the freezer from the bottom to the top. Write down the measurement in inches.
Measure the depth of the inside of the freezer from the front to the back wall. Write down the measurement in inches.
Multiply the length, height and depth measurements together to determine how many cubic inches the freezer has. Divide the cubic inches measurement by 1728 to determine the cubic feet of the freezer.
Open the door of the refrigerator and remove any food inside. Remove all shelves and drawers so the refrigerator is empty.
Measure the length, height and depth of the refrigerator in the same manner as you did for the freezer. Multiply the measurements and divide that number by 1728 to determine cubic feet.
Add the cubic feet of the freezer to the cubic feet of the refrigerator body to determine the total cubic feet for the refrigerator.