Tons per Square Inch (tsi), UK, Long

ons or Tons Force per Square Inch (UK, Long) is a very large pressure unit used historically for measuring extremely high pressures. 1 ton per square inch (UK, Long) equals 15,444,300 pascals.

This Imperial version of tons per square inch uses the United Kingdom long ton which is equal to 2,240 pounds (lbs).

Due to the high value of one tsi (uk, long) it is not used for common everyday pressures and is mostly used when quoting pressures generated by geological forces or deep ocean depths. The tsi (uk, long) unit is also used as a measure of tensile strength of materials such as steel.