How big is 3.5 cubic feet?

Calculating volume of an object can aid in the decision of whether or not to purchase a certain size of something. A refrigerator is sold by the contents it can hold, in cubic feet. Swimming Pools are installed by the gallon capacity, but they are first calculated by the cubic foot and then converted into gallons. A cubic foot of water weighs 62.31 pounds at 68 degrees F and contains approximately 7.5 gallons.