Convert Feddan to Barns
Convert Feddan (fed) to Barns (b) instantly and accurately.
Conversion Formula
b = fed × 4.200000000e+31
About Feddan
A feddan (فدان) is the primary unit of land area in Egypt, Sudan, and parts of the Arab world, equal to approximately 4,200 m² (1.038 acres or 0.42 hectares). Its name derives from the Arabic word for 'yoke of oxen,' reflecting its agricultural origins - similar to the British acre. Egypt reports its cultivated farmland in millions of feddan; the fertile Nile Delta that feeds Egypt is measured in feddan. The feddan is subdivided into 24 kirats (each ~175 m²). It remains the legal standard for agricultural land registration in Egypt and Sudan.
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
| Feddan (fed) | Barns (b) |
|---|---|
| 1 fed | 4.2 × 1031 b |
| 2 fed | 8.4 × 1031 b |
| 5 fed | 2.1 × 1032 b |
| 10 fed | 4.2 × 1032 b |
| 25 fed | 1.05 × 1033 b |
| 50 fed | 2.1 × 1033 b |
| 100 fed | 4.2 × 1033 b |