Convert Barns to Square Inches
Convert Barns (b) to Square Inches (in²) instantly and accurately.
Conversion Formula
in² = b × 1.550003100e-25
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 Inches
A square inch (in²) is an imperial unit of area equal to a square with sides of one inch (25.4 mm × 25.4 mm). It is commonly used in the United States for measuring small areas like fabric swatches, screen sizes, or printed materials. A standard business card is about 6 in², and a typical smartphone screen might be 15-20 in². This unit remains prevalent in American manufacturing, printing, and retail.
Quick Reference Table
| Barns (b) | Square Inches (in²) |
|---|---|
| 1 b | 1.55 × 10-25 in² |
| 2 b | 3.1 × 10-25 in² |
| 5 b | 7.75 × 10-25 in² |
| 10 b | 1.55 × 10-24 in² |
| 25 b | 3.875 × 10-24 in² |
| 50 b | 7.75 × 10-24 in² |
| 100 b | 1.55 × 10-23 in² |