The process of determining billable weight for air shipments often necessitates comparing the actual weight of the consignment with its volumetric weight. Volumetric weight, also known as dimensional weight, reflects the density of the package. It is calculated based on the dimensions of the shipment (length, width, and height) and a dimensional factor, which varies depending on the carrier and the units used (kilograms or pounds, centimeters or inches). For example, a lightweight but bulky item may be charged based on its volumetric weight rather than its actual weight, ensuring fair pricing that accounts for the space occupied in the aircraft.
This comparison is crucial because air cargo capacity is finite and airlines must optimize space utilization to maximize revenue. By using the greater of the actual or volumetric weight, airlines can ensure compensation for transporting lightweight, low-density items that nonetheless consume significant space within the cargo hold. Historically, the concept of dimensional weight emerged to address inconsistencies in pricing and profitability associated with differing cargo densities. This practice helps maintain a sustainable and equitable pricing model within the air freight industry.