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