Convert Square Furlongs to Barns
Convert Square Furlongs (fur²) to Barns (b) instantly and accurately.
Conversion Formula
b = fur² × 4.046856422e+32
About Square Furlongs
A square furlong is an area unit equal to a square with sides of one furlong (220 yards or ~201.17 m), approximately 40,469 m² or exactly 10 acres. The furlong (from Old English 'furrow-long') was historically the standard ploughing distance, and 10 square furlongs equals one acre - a relationship that made traditional land surveying convenient. While square furlongs are rarely used in official modern measurements, they appear in historical land surveys, British horse racing contexts, and as a handy reference for visualising 10-acre blocks.
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).
Quick Reference Table
| Square Furlongs (fur²) | Barns (b) |
|---|---|
| 1 fur² | 4.047 × 1032 b |
| 2 fur² | 8.094 × 1032 b |
| 5 fur² | 2.023 × 1033 b |
| 10 fur² | 4.047 × 1033 b |
| 25 fur² | 1.012 × 1034 b |
| 50 fur² | 2.023 × 1034 b |
| 100 fur² | 4.047 × 1034 b |