Convert Square Micrometers to Rai
Convert Square Micrometers (μm²) to Rai (rai) instantly and accurately.
Conversion Formula
rai = μm² × 6.250000000e-16
About Square Micrometers
A square micrometer (μm²), also called a square micron, equals one trillionth of a square meter - the area of a square with sides one millionth of a meter (10⁻¹² m²). This is the natural scale of biological cells: a human red blood cell has a surface area of about 135 μm², and a typical bacterium might occupy 2-10 μm². Square micrometers are the standard unit in cell biology, histology, microscopy, and semiconductor characterisation where individual features on wafers are measured.
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 Micrometers (μm²) | Rai (rai) |
|---|---|
| 1 μm² | 6.25 × 10-16 rai |
| 2 μm² | 1.25 × 10-15 rai |
| 5 μm² | 3.125 × 10-15 rai |
| 10 μm² | 6.25 × 10-15 rai |
| 25 μm² | 1.563 × 10-14 rai |
| 50 μm² | 3.125 × 10-14 rai |
| 100 μm² | 6.25 × 10-14 rai |