Convert Barns to Square Miles
Convert Barns (b) to Square Miles (mi²) instantly and accurately.
Conversion Formula
mi² = b × 3.861021585e-35
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 Miles
A square mile (mi²) is an imperial unit of area equal to a square with sides of one mile (5,280 ft × 5,280 ft). It is used for measuring large land areas like counties, states, and countries in the United States. Los Angeles covers about 503 mi², Rhode Island (smallest US state) is roughly 1,214 mi², and Alaska is about 665,384 mi². This unit is standard in American geography, land surveying, and regional planning.
Quick Reference Table
| Barns (b) | Square Miles (mi²) |
|---|---|
| 1 b | 3.861 × 10-35 mi² |
| 2 b | 7.722 × 10-35 mi² |
| 5 b | 1.931 × 10-34 mi² |
| 10 b | 3.861 × 10-34 mi² |
| 25 b | 9.653 × 10-34 mi² |
| 50 b | 1.931 × 10-33 mi² |
| 100 b | 3.861 × 10-33 mi² |