This calculator allows you to convert from Pound-force/square inch to Kilogram-force/sq. millimeter and in a reverse direction. To convert from Pound-force/square inch to Kilogram-force/sq. millimeter, enter the amount of Pound-force/square inch into the first input and to convert from Kilogram-force/sq. millimeter to Pound-force/square inch, enter the amount of Kilogram-force/sq. millimeter into the second input.