Kips per square inch to gigapascals conversion calculator above calculates how many gigapascals are in 'X' kips per square inch (where 'X' is the number of kips per square inch to convert to gigapascals). In order to convert a value from kips per square inch to gigapascals (from ksi to GPa) just type the number of ksi to be converted to GPa and then click on the 'convert' button.