Pounds per square inch to kips per square inch converter above calculates how many kips per square inch are in 'X' pounds per square inch (where 'X' is the number of pounds per square inch to convert to kips per square inch). In order to convert a value from pounds per square inch to kips per square inch (from psi to ksi) simply type the number of psi to be converted to ksi and then click on the 'convert' button.