Convert Barns to Rai
Convert Barns (b) to Rai (rai) instantly and accurately.
Conversion Formula
rai = b × 6.250000000e-32
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 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.
Quick Reference Table
| Barns (b) | Rai (rai) |
|---|---|
| 1 b | 6.25 × 10-32 rai |
| 2 b | 1.25 × 10-31 rai |
| 5 b | 3.125 × 10-31 rai |
| 10 b | 6.25 × 10-31 rai |
| 25 b | 1.562 × 10-30 rai |
| 50 b | 3.125 × 10-30 rai |
| 100 b | 6.25 × 10-30 rai |