Convert Square Thou to Square Micrometers
Convert Square Thou (thou²) to Square Micrometers (μm²) instantly and accurately.
Conversion Formula
μm² = thou² × 645.16
About Square Thou
A square thou (thou²), sometimes called a square mil, is the area of a square with sides of one thousandth of an inch (0.0254 mm), equal to approximately 6.452 × 10⁻¹⁰ m². This tiny imperial unit is indispensable in precision engineering, PCB (printed circuit board) design, and manufacturing, where conductor widths, dielectric coating thicknesses, and tight machining tolerances are specified in thou. Wire insulation, thin films, and precision-stamped metal components are commonly described using this unit.
About Square Micrometers
A square micrometer (μm²), also called a square micron, equals one trillionth of a square meter - the area of a square with sides one millionth of a meter (10⁻¹² m²). This is the natural scale of biological cells: a human red blood cell has a surface area of about 135 μm², and a typical bacterium might occupy 2-10 μm². Square micrometers are the standard unit in cell biology, histology, microscopy, and semiconductor characterisation where individual features on wafers are measured.
Quick Reference Table
| Square Thou (thou²) | Square Micrometers (μm²) |
|---|---|
| 1 thou² | 645.16 μm² |
| 2 thou² | 1290.32 μm² |
| 5 thou² | 3225.8 μm² |
| 10 thou² | 6451.6 μm² |
| 25 thou² | 16129 μm² |
| 50 thou² | 32258 μm² |
| 100 thou² | 64516 μm² |