Newtons per square meter to gigapascals conversion calculator above calculates how many gigapascals are in 'X' newtons per square meter (where 'X' is the number of newtons per square meter to convert to gigapascals). In order to convert a value from newtons per square meter to gigapascals (from N/m² to GPa) type the number of N/m² to be converted to GPa and then click on the 'convert' button.