Convert Square Inches to Rai
Convert Square Inches (in²) to Rai (rai) instantly and accurately.
Conversion Formula
rai = in² × 4.032250000e-7
About Square Inches
A square inch (in²) is an imperial unit of area equal to a square with sides of one inch (25.4 mm × 25.4 mm). It is commonly used in the United States for measuring small areas like fabric swatches, screen sizes, or printed materials. A standard business card is about 6 in², and a typical smartphone screen might be 15-20 in². This unit remains prevalent in American manufacturing, printing, and retail.
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 Inches (in²) | Rai (rai) |
|---|---|
| 1 in² | 4.032 × 10-7 rai |
| 2 in² | 8.065 × 10-7 rai |
| 5 in² | 2.016 × 10-6 rai |
| 10 in² | 4.032 × 10-6 rai |
| 25 in² | 1.008 × 10-5 rai |
| 50 in² | 2.016 × 10-5 rai |
| 100 in² | 4.032 × 10-5 rai |