Square Millimeter

A square millimeter is a unit of area used for measuring very small areas. The unit is used as a part of SI measurement system and has a symbol of mm². One square millimeter is the area that equals to 1/100^th of a square centimeter (or 0.01 cm²) or equals to 1/1000000^th of a square meter (1.0 x 10^-6 m²).