Short ton, also known as the "US ton", is a unit of weight measurement commonly used in the United States for trade and commerce. However, there are other synonyms for short ton, which can be confusing for those not familiar with other measurement systems. For example, the metric ton, also known as the tonne, is equivalent to 1,000 kilograms or 2,204.62 pounds, and is more commonly used in countries outside of the US. The long ton, also known as the gross ton, is used in the UK and is equivalent to 2,240 pounds or 1.016 metric tons. Another less common synonym is the tonelada, or Spanish ton, which is equivalent to 1,000 kilograms or 2,204.62 pounds, and is used in Spanish-speaking countries.