Convert Rai to Barns
Convert Rai (rai) to Barns (b) instantly and accurately.
Conversion Formula
b = rai × 1.600000000e+31
About Rai
A rai (ไร่) is the standard Thai unit of land area, defined as exactly 1,600 m² (40 m × 40 m). It is used throughout Thailand for all land measurement - from rice paddies to urban plots and national parks. Thai real estate listings always quote land area in rai, ngan (400 m² = ¼ rai), and talang wah (4 m² = 1 square wah). Thailand's total rice-paddy area is reported in millions of rai. One rai equals approximately 0.395 acres or 0.16 hectares.
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
| Rai (rai) | Barns (b) |
|---|---|
| 1 rai | 1.6 × 1031 b |
| 2 rai | 3.2 × 1031 b |
| 5 rai | 8 × 1031 b |
| 10 rai | 1.6 × 1032 b |
| 25 rai | 4 × 1032 b |
| 50 rai | 8 × 1032 b |
| 100 rai | 1.6 × 1033 b |