Convert Rai to Square Megameters
Convert Rai (rai) to Square Megameters (Mm²) instantly and accurately.
Conversion Formula
Mm² = rai × 1.600000000e-9
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 Square Megameters
A square megameter (Mm²) equals the area of a square with sides of one million meters - 10¹² m², or one trillion square meters. At this scale we describe major geographic and planetary regions. The entire land surface of Earth is about 149 Mm², the Indian Ocean covers roughly 70 Mm², and the Sahara Desert spans approximately 9.2 Mm². Square megameters provide a convenient scale for comparing continent-sized areas without resorting to hundreds of millions of square kilometers.
Quick Reference Table
| Rai (rai) | Square Megameters (Mm²) |
|---|---|
| 1 rai | 1.6 × 10-9 Mm² |
| 2 rai | 3.2 × 10-9 Mm² |
| 5 rai | 8 × 10-9 Mm² |
| 10 rai | 1.6 × 10-8 Mm² |
| 25 rai | 4 × 10-8 Mm² |
| 50 rai | 8 × 10-8 Mm² |
| 100 rai | 1.6 × 10-7 Mm² |