Air Freight costs are determined by Chargeable Weight. The Chargeable Weight (cw) of an airfreight is determined by the actual gross weight (gw) or the volume weight (vw), whichever is greater.
Example 1 : Chargeable weight calculation for one (1) pallet load with measurements of 100 cm x 100 cm x 100 cm with a gross weight of 100 kgs Actual Volume = 1 x 1 x 1 = 1 cubic metre Calculating Chargeable Weight for 1 cubic metre = 1 /0.006 = 167 kgs (rounded up) and not the gross weight of 100 kgs as volume weight of 167 kgs is the greater.
Example 2 : If using the same measurements for pallet load as above but with an actual gross weight of 200 kgs, the chargeable weight is then 200 kgs as it is greater then the calculated volume weight.
Volumetric weight, sometimes called "dim" or dimensional weight, is used when the space a package takes on an aircraft may cost more than the package's actual weight.
You should calculate dimensional weight on every shipment, and compare that to its actual weight, and use the greater of the two to determine your shipping cost. International volumetric weights are calculated using the formula below.
Length x Width x Height (in centimetres) / 6000 = Volumetric Weight in kgs.