Newtons per square millimeter to pieze conversion calculator shown above calculates how many pieze are in 'X' newtons per square millimeter (where 'X' is the number of newtons per square millimeter to convert to pieze). In order to convert a value from newtons per square millimeter to pieze (from N/mm² to pz) simply type the number of N/mm² to be converted to pz and then click on the 'convert' button.