Convert Barns to Square Thou
Convert Barns (b) to Square Thou (thou²) instantly and accurately.
Conversion Formula
thou² = b × 1.550003100e-19
About Barns
A barn (b) is a unit of area used in nuclear and particle physics to measure effective cross-sections of atomic nuclei and particle interaction probabilities. Equal to 10⁻²⁸ m² (10⁻²⁴ cm²), it was humorously named during the Manhattan Project - physicists joked that uranium nuclei were 'as big as a barn' at the subatomic scale. Particle physics experiments at accelerators like CERN report cross-sections in millibarns (mb), microbarns (μb), nanobarns (nb), and femtobarns (fb).
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.
Quick Reference Table
| Barns (b) | Square Thou (thou²) |
|---|---|
| 1 b | 1.55 × 10-19 thou² |
| 2 b | 3.1 × 10-19 thou² |
| 5 b | 7.75 × 10-19 thou² |
| 10 b | 1.55 × 10-18 thou² |
| 25 b | 3.875 × 10-18 thou² |
| 50 b | 7.75 × 10-18 thou² |
| 100 b | 1.55 × 10-17 thou² |