Chargeable weight is what the airline uses to determine the cost of your shipment.
In aviation, airfreight charge is calculated based on actual weight or volumetric weight, whichever is greater.
Let’s talk examples. If a shipper exports cotton, the actual weight of cotton is very low but occupies a good amount of space as a volume. Whereas other shipper exports iron plates – a small amount of space as a volume but very heavy.
Here is the basic rule for calculation of chargeable weight: