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