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