Kilopound per square inch is a unit of stress or pressure. The abbreviation for Kilopound per square inch is ksi.
If one killopound force is applied on a one square inch area, the resultant pressure or stress will be one ksi (kilopound per square inch)
It is a derived unit from other pressure unit psi (pound square inch). If we multiply psi by 1000 we will get ksi. Therefore, 1 ksi = 1000 psi.