Convert Barns to Square Nanometers
Convert Barns (b) to Square Nanometers (nm²) instantly and accurately.
Conversion Formula
nm² = b × 1.000000000e-10
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 Nanometers
A square nanometer (nm²) is an extraordinarily small unit of area - the area of a square with sides just one billionth of a meter. At this scale we measure individual molecules and atomic structures. The cross-section of a DNA double helix is roughly 20 nm², and modern transistor gates in cutting-edge microchips have areas measured in tens of nm². Square nanometers are essential in nanotechnology, semiconductor fabrication, surface chemistry, and scanning-tunnelling microscopy.
Quick Reference Table
| Barns (b) | Square Nanometers (nm²) |
|---|---|
| 1 b | 1 × 10-10 nm² |
| 2 b | 2 × 10-10 nm² |
| 5 b | 5 × 10-10 nm² |
| 10 b | 1 × 10-9 nm² |
| 25 b | 2.5 × 10-9 nm² |
| 50 b | 5 × 10-9 nm² |
| 100 b | 1 × 10-8 nm² |