Volumetric weight, also known as dimensional weight, is a pricing technique that freight and parcel companies use to charge for shipments based on the amount of space they occupy in a vehicle, as opposed to their actual weight. This method is particularly relevant for lightweight but bulky packages. The calculation typically involves multiplying the length, width, and height of the package (in inches or centimeters) and dividing by a dimensional factor, often referred to as a DIM factor or divisor. For example, a package measuring 20 inches x 15 inches x 10 inches, with a DIM factor of 139, would have a volumetric weight of approximately 21.58 pounds (20 x 15 x 10 / 139 = 21.58). The carrier then charges the higher of the actual weight and the volumetric weight.
This pricing strategy ensures that carriers are compensated for the space utilized by shipments, especially when dealing with low-density items. The use of dimensional weight allows for a more equitable and efficient allocation of resources within the transportation network. Historically, reliance solely on actual weight led to inefficiencies, as lightweight but large packages consumed valuable cargo space while generating lower revenue. By factoring in volume, carriers can better reflect the true cost of transportation and optimize their load planning.
