Square Nanometer [nm²]
A square nanometer (nm²) is a unit of area equal to a square with sides 1 nanometer long (1 nm = 1 billionth of a meter, or 10⁻⁹ m).
It’s used to measure extremely tiny areas, like the surface of molecules or nanomaterials.
1 nm² = 1 × 10⁻¹⁸ m².
Square Foot [ft²]
A square foot (ft²) is a unit of area commonly used in the United States and other countries. It represents a square with sides 1 foot (12 inches) long.
1 square foot = 144 square inches = 0.0929 square meters.
Square feet are widely used to measure the area of rooms, houses, and small plots of land.