whats 1 cubic foot refers to the volume of a space or container that is one foot long, one foot wide, and one foot high. This unit of measurement is often used in shipping to determine the dimensional weight of a package, which helps determine shipping costs. For example, if a package is 12 inches by 12 inches by 12 inches, it would have a volume of 1 cubic foot. Knowing the cubic footage of a package helps businesses and customers estimate the cost of shipping, as carriers like UPS, FedEx, and USPS often use cubic feet to calculate pricing for larger or oddly shaped items.