What are Square Millimeters?
A square millimeter is the area of a square one millimeter on each side, so there are 100 in a square centimeter and 1,000,000 in a square meter. Electrical cable is sized by cross-section in them – 1.5mm² and 2.5mm² are common.
What are Square Feet?
Square feet are units of measurement used to quantify area in the English/ Imperial system. Square feet is a unit commonly used in the imperial and US customary systems.
A square foot is a unit of area equal to a square with sides that are each one foot long. It is often used to measure the size of rooms, houses, and small plots of land.