A short ton is equal to 2000 pounds; a long tonne is equal to 2200 pounds. This means there are 2200/2000 = 1.1 tons in a tonne.
1 short ton = 0.90718474 metric tons. To convert a value in short tons to metric tons, multiply by 0.90718474.
A tonne is a metric ton (1000 kilograms)
1. But be careful, the US has at least three different tons: short, long, and deadweight. A metric ton is 1,000 kilograms.