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