Convert Rai to Acres
Convert Rai (rai) to Acres (ac) instantly and accurately.
Conversion Formula
ac = rai × 0.3953686103
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 Acres
An acre is a traditional unit of land area used primarily in the United States, United Kingdom, and countries with British heritage. One acre equals 43,560 ft² or about 4,047 m². Historically based on the area a yoke of oxen could plow in one day, it remains the standard for measuring agricultural land, residential plots, and rural properties. A football field (without end zones) is roughly 1.32 acres, and most suburban house lots range from 0.25 to 1 acre.
Quick Reference Table
| Rai (rai) | Acres (ac) |
|---|---|
| 1 rai | 0.395369 ac |
| 2 rai | 0.790737 ac |
| 5 rai | 1.97684 ac |
| 10 rai | 3.95369 ac |
| 25 rai | 9.88422 ac |
| 50 rai | 19.7684 ac |
| 100 rai | 39.5369 ac |