Newtons per meter squared
Newtons per meter squared is the same as Pascals (Pa). It is one Newton of force exerted on an area of one square meter.
pound force per square inch
Pound force per square inch (psi) is a unit from the Imperial system defined as the pressure resulting from a force of one pound-force applied to an area of one square inch. It is used in various applications such as tire pressure and hydraulic systems.