Tensile Strength Convert From newtons per millimetre squared megapascals kilopascals pounds per square inch thousands of pounds per square inch Rounded to decimals 1 2 3 4 5 6 7 8 No Newtons per millimetre squared N/mm2 Megapascals MPa Kilopascals KPa Pounds per square inch psi Thousands of pounds per square inch ksi people found this article helpful. What about you?