The short ton (abbreviation: tn or st), also known as the US ton, is a measurement unit equal to . It is commonly used in the United States, where it is known simply as a ton; They are sometimes used as units of weight, the force exerted by a mass at standard gravity (e.g., short ton-force). One short ton exerts a weight at one standard gravity of 2,000 pound-force (lbf).
United States
In the United States, a short ton is usually known simply as a "ton", or metric tons (world grain production figures).
Both the long and short ton are defined as 20 hundredweights, but a hundredweight is in the US system (short or net hundredweight) and in the imperial system (long or gross hundredweight).