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