A refrigerator's cubic footage is determined by multiplying the height, width and depth of the refrigerator's interior. In order to calculate the unit's total cubic footage, this number should be added to the cubic feet of the refrigerator. It is important to take this measurement in feet rather than inches.
Most refrigerators offer between 19 and 32 cubic feet of space. The amount of available space is determined by the model and type of refrigerator. Generally French door refrigerators have the largest capacity, followed by side-by-side models.
Mini refrigerators have a significantly smaller profile and are generally 2 to 6 cubic feet in size.