Convert Rai to Square Foot (rai → ft²)

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

Rai

Square Foot

17,222.257

1 rai17,222.257 ft²NIST · BIPM accuracy

Rai to Square Foot Conversion Table

10 common values

Rai	Square Foot
1 rai	17,222.257 ft²
5 rai	86,111.283 ft²
10 rai	172,222.57 ft²
50 rai	861,112.83 ft²
100 rai	1,722,225.7 ft²
500 rai	8,611,128.3 ft²
1,000 rai	17,222,257 ft²
5,000 rai	86,111,283 ft²
10,000 rai	172,222,570 ft²
50,000 rai	861,112,830 ft²

How to Convert Rai to Square Foot Manually

Step by Step

Converting rais to square feet 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 17,222.257
The conversion factor from rai to ft² is 17,222.257. Multiply your value by this number.
3
Read the result in square feet
The result is your value in square feet (ft²).

Practical Examples

1 rai

equals

17,222.257 ft²

5 rai

equals

86,111.283 ft²

10 rai

equals

172,222.57 ft²

25 rai

equals

430,556.42 ft²

100 rai

equals

1,722,225.7 ft²

Formula

Multiply the value in rais by 17,222.257. For the reverse direction, multiply by 0.00005806.

Forwardft² = rai × 17,222.257

Reverserai = ft² × 0.00005806

Example: 10 rai × 17,222.257 = 172,222.57 ft²

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 Foot

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 Foot?

The square foot equals exactly 0.09290304 square meters and is the standard unit for American and British residential and commercial real estate. US apartments are advertised by total square footage (a typical 2-bedroom apartment is 800–1,200 ft²), and home-improvement projects (flooring, paint coverage, drywall) use square feet for material calculations. Commercial leases quote rates in dollars per ft² per year. The square foot is intuitive for human-scale spaces — a typical office cubicle is about 64 ft² (8 ft × 8 ft). It relates to the square meter (1 ft² ≈ 0.0929 m²), the square yard (9 ft² = 1 yd²), the square inch (144 in² = 1 ft²), and the acre (43,560 ft² = 1 acre). Outside the US and UK, square meters dominate; within them, the square foot is the everyday property unit.