What are Chargeable Weight and Chargeable Volume (WM i.e. Weight – Measurements)?
Shippers should be aware of CHARGEABLE WEIGHT AND CHARGEABLE VOLUME (W/M) definitions used in different modes of cargo transportation. In respect of Ocean and Inland modes the meanings of WM are: OCEAN MODE OF TRANSPORTATION: Since vessel capacity is not really limited by weight of cargo but by the hold of the ship, then charges for regular ocean shipments are based on the total cargo volume. In general for sea shipments, the weight of the cargo is not a pricing factor. However there is a cargo density limit if WM ocean freight rates are present. It varies depending on the carrier, origin and destination, etc. Regular shipments most likely will not exceed the limit. In general exporters have to be aware of the U.S. 45 lbs rule, 45 lbs = 1 cubic foot. This means that if the density of the cargo exceeds 45 lbs per one cubic foot, then chargeable volume will be calculated using this formula: Total Weight of the cargo (in pounds) divided by 45 lbs = Chargeable Volume in cubic feet. The lim
