Convert Rai to Square Inch (rai → in²)

The rai is the traditional Thai land unit, equal to 1,600 square meters, used in real estate and agriculture.

Rai

Square Inch

2,480,005

1 rai2,480,005 in²NIST · BIPM accuracy

Rai to Square Inch Conversion Table

10 common values

Rai	Square Inch
1 rai	2,480,005 in²
5 rai	12,400,025 in²
10 rai	24,800,050 in²
50 rai	124,000,250 in²
100 rai	248,000,500 in²
500 rai	1,240,002,500 in²
1,000 rai	2,480,005,000 in²
5,000 rai	12,400,025,000 in²
10,000 rai	24,800,050,000 in²
50,000 rai	124,000,250,000 in²

How to Convert Rai to Square Inch Manually

Step by Step

Converting rais to square inches is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1
Take your value in rais
Start with the number of rais (rai) you want to convert.
2
Multiply by 2,480,005
The conversion factor from rai to in² is 2,480,005. Multiply your value by this number.
3
Read the result in square inches
The result is your value in square inches (in²).

Practical Examples

1 rai

equals

2,480,005 in²

5 rai

equals

12,400,025 in²

10 rai

equals

24,800,050 in²

25 rai

equals

62,000,124 in²

100 rai

equals

248,000,500 in²

Formula

Multiply the value in rais by 2,480,005. For the reverse direction, multiply by 4.032e-7.

Forwardin² = rai × 2,480,005

Reverserai = in² × 4.032e-7

Example: 10 rai × 2,480,005 = 24,800,050 in²

Tips

Use these in everyday conversions

1 rai = 1600 m² = 0.16 ha.
1 rai = 4 ngan = 400 tarang wa.
1 hectare = 6.25 rai.

Common Mistakes

Avoid these

Assuming rai equals hectare — only 16%.
Mixing rai with ngan or tarang wa without conversion.
Using rai outside Thailand — not internationally recognised.

About Rai and Square Inch

What is the Rai?

The rai equals exactly 1,600 square meters (40 m × 40 m) and is the traditional Thai land unit, still officially used in Thailand for real estate, agriculture, and property records. The rai is divided into 4 ngan (each 400 m²), and 1 ngan equals 100 wa (each 4 m²). Despite Thailand's adoption of the metric system, the rai remains the everyday unit for buying and selling land in Thai contexts — a small urban plot might be 1 rai, while rural farms are quoted in tens or hundreds of rai. The rai relates to the square meter (1 rai = 1,600 m²), the hectare (1 ha = 6.25 rai), and the acre (1 acre ≈ 2.529 rai). The rai's exact metric definition (1,600 m²) makes conversion to SI units precise, unlike many traditional land units.

Thai rural property and farmland
Thai real-estate listings
Agricultural yield reporting in Thailand

Real-world examples

A small Thai farm might be 10–20 rai (1.6–3.2 ha). Thai rice yields: 400–600 kg per rai.

What is the Square Inch?

The square inch equals exactly 6.4516 square centimeters and is the American precision unit for printer paper coverage, manufacturing tolerances, and small-area calculations. Pressure in the US is measured in pounds per square inch (psi), so the unit is essential in engineering and tire-pressure ratings. Computer screens are sometimes specified by total viewable square inches. The square inch relates to the square foot (144 in² = 1 ft²), the square centimeter (1 in² = 6.4516 cm²), the square millimeter (1 in² ≈ 645.16 mm²), and the square meter (1 in² ≈ 0.000645 m²). Postage-stamp areas, electronic-circuit board details, and machined-part tolerances all use square inches in American engineering practice.