Kilogram force per square meter
Kilogram force per square meter (kgf/m²) is a unit from the force of one kilogram under standard gravity (9.80665 m/s²) 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.