Square Mil [mil²]
A square mil (mil²) is a very small unit of area used mainly in engineering and manufacturing, especially for measuring the cross-sectional area of wires and thin materials.
1 mil = 1/1000 of an inch (0.001 inch)
1 square mil = (0.001 inch)² = 0.000001 square inches (in²)
1 square mil ≈ 6.4516 × 10⁻¹⁰ square meters (m²)
Square mils are useful for precise measurements in electronics and materials science.
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.