The volumetric weight of a shipment is a calculation that reflects the density of a package. A less dense item generally occupies more volume of space, in comparison to its actual weight. The volumetric or dimensional weight is calculated and compared with the actual weight for each piece in the shipment to ascertain which is greater; the higher weight is used to calculate the total shipment cost.
How to Calculate the Volumetric Weight of Your Express Shipment
Length * width * height/5000 per piece in the shipment