Convert Rai to Hectares
Convert Rai (rai) to Hectares (ha) instantly and accurately.
Conversion Formula
ha = rai × 0.16
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 Hectares
A hectare (ha) is a metric unit of area equal to 10,000 m² (100 m × 100 m). It is the primary unit for measuring agricultural land, forests, and large properties worldwide outside the United States. One hectare equals 2.471 acres. A FIFA-regulation football pitch is about 0.7 ha, and Vatican City is 44 ha. This unit is fundamental in agriculture, forestry, environmental conservation, and international land measurement standards.
Quick Reference Table
| Rai (rai) | Hectares (ha) |
|---|---|
| 1 rai | 0.16 ha |
| 2 rai | 0.32 ha |
| 5 rai | 0.8 ha |
| 10 rai | 1.6 ha |
| 25 rai | 4 ha |
| 50 rai | 8 ha |
| 100 rai | 16 ha |