Convert Square Rods to Rai
Convert Square Rods (sq rd) to Rai (rai) instantly and accurately.
Conversion Formula
rai = sq rd × 0.0158080329
About Square Rods
A square rod (sq rd), also called a perch or square pole, equals the area of a square with sides of one rod (5.0292 m or 16.5 ft), giving approximately 25.29 m². This traditional unit was central to land surveying before the adoption of the metric system and remains embedded in legal property descriptions in the United States. There are exactly 160 square rods in one acre, and 40 square rods in one rood. Old farmland deeds and archaic land records in the UK and US frequently reference perches and square rods.
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
| Square Rods (sq rd) | Rai (rai) |
|---|---|
| 1 sq rd | 0.015808 rai |
| 2 sq rd | 0.0316161 rai |
| 5 sq rd | 0.0790402 rai |
| 10 sq rd | 0.15808 rai |
| 25 sq rd | 0.395201 rai |
| 50 sq rd | 0.790402 rai |
| 100 sq rd | 1.5808 rai |