How many?

Tonnes

The tonne is a metric unit of mass equal to 1,000 kilograms. It is also referred to as a metric ton to distinguish it from the non-metric unit. It is equivalent to approximately 2,204.6 pounds.

Long Tons

A long ton is defined as exactly 2,240 pounds. The long ton arises from the traditional British measurement system: A long ton is 20 hundredweight (cwt), each of which is 8 stone (1 stone = 14 pounds). Thus a long ton is 20 × 8 × 14 lb = 2,240 lb.