Convert Roods to Rai
Convert Roods (ro) to Rai (rai) instantly and accurately.
Conversion Formula
rai = ro × 0.632321316
About Roods
A rood (ro) is a traditional English unit of land area equal to one quarter of an acre, or 40 square rods, approximately 1,011.71 m². Originating in medieval England, the rood was used alongside the acre and the perch for describing land ownership. The name shares its root with 'rod,' the linear unit used to measure it. While largely obsolete in modern use, roods still appear in old English legal documents, historical land surveys, and certain rural property records in England and Wales.
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
| Roods (ro) | Rai (rai) |
|---|---|
| 1 ro | 0.632321 rai |
| 2 ro | 1.26464 rai |
| 5 ro | 3.16161 rai |
| 10 ro | 6.32321 rai |
| 25 ro | 15.808 rai |
| 50 ro | 31.6161 rai |
| 100 ro | 63.2321 rai |