Tonnage and Poundage

Tonnage refers to the measurement of a ship's size or cargo-carrying capacity, often expressed in units like gross or net tonnage, reflecting its volume. Poundage, historically, was a specific tax based on the weight of goods shipped, calculated in pounds. In some contexts, poundage also refers to a fee or duty determined by the weight of something transported or sold. Both terms originated in maritime and trade practices, with tonnage focusing on physical dimensions and capacity, while poundage relates to taxation or fees based on weight.