Units of mass There're several similar units of mass or volume called the Ton: Full name Common name Quantity Notes pounds kilograms long Ton, weight Ton, gross Ton "Ton" (UK) Used in countries such as United Kingdom that formerly used the imperial system, except Canada, the ton always has a capital T and should always be singular, whereas a tonne has a small t. short Ton, net Ton "Ton" (US) Used in the United States and Canada tonne, metric Ton "metric Ton" (US) }} 1000 The tonn… (More on Ton)