Ton

Ton might refer to

 The common ton or short ton, defined as 2,000 pounds avoirdupois (1000kg)
 The long ton, defined as 2,240 pounds (1 016 kg)
 The ton or tonne, called a metric ton in the United States, is defined as 1,000 kilograms (2,204 pounds). This unit is also called a "mega-gram" (1 000 000 g) but "tonne" is more convenient.