ton-force (long) [tonf (UK)] Unit Converter

Definition of ton-force (long) [tonf (UK)] unit

Ton-force (long) is a unit of force equal to the gravitational force exerted on a long ton (2,240 avoirdupois pounds) under standard gravity. It equals 2,240 pound-force, approximately 9,964.016 newtons, and is also called long-ton force.

History of ton-force (long) [tonf (UK)] unit

The long ton-force developed within British imperial measurement practice, where a long ton represented 2,240 pounds, or 20 hundredweight of 112 pounds each. Engineers and industry traditionally paired this mass unit with gravitational force, especially in Britain and countries influenced by British standards. The unit was widely encountered in nineteenth- and twentieth-century shipping, railways, mining, construction, and heavy engineering. Although standard gravity later provided a precise definition, international metrication and adoption of the newton reduced its official importance. It remains documented in older technical references and some specialized industries.

Applications of ton-force (long) [tonf (UK)] unit

Today, long ton-force mainly appears in legacy specifications, historical engineering documents, and industries retaining imperial terminology. It may describe the capacity of presses, anchors, winches, lifting equipment, mooring systems, and structural components. Shipbuilding and marine references can use it for bollard pull or load ratings, while modern calculations typically convert it to kilonewtons, with one long ton-force equaling approximately 9.964 kN.

Complete list of ton-force (long) [tonf (UK)] unit conversion