Convert Rai to Square Centimeter (rai → cm²)
The rai is the traditional Thai land unit, equal to 1,600 square meters, used in real estate and agriculture.
Rai to Square Centimeter Conversion Table
10 common values| Rai | Square Centimeter |
|---|---|
| 1 rai | 16,000,000 cm² |
| 5 rai | 80,000,000 cm² |
| 10 rai | 160,000,000 cm² |
| 50 rai | 800,000,000 cm² |
| 100 rai | 1,600,000,000 cm² |
| 500 rai | 8,000,000,000 cm² |
| 1,000 rai | 16,000,000,000 cm² |
| 5,000 rai | 80,000,000,000 cm² |
| 10,000 rai | 160,000,000,000 cm² |
| 50,000 rai | 800,000,000,000 cm² |
How to Convert Rai to Square Centimeter Manually
Step by StepConverting rais to square centimeters is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in raisStart with the number of rais (rai) you want to convert.
- 2Multiply by 16,000,000The conversion factor from rai to cm² is 16,000,000. Multiply your value by this number.
- 3Read the result in square centimetersThe result is your value in square centimeters (cm²).
Formula
Multiply the value in rais by 16,000,000. For the reverse direction, multiply by 6.25 × 10^-8.
cm² = rai × 16,000,000rai = cm² × 6.25 × 10^-8Tips
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 Centimeter
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
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 Centimeter?
The square centimeter equals one ten-thousandth of a square meter (1/10,000 m² = 0.0001 m²) and is the everyday metric unit for small areas: cross-sections in engineering, biological specimen surfaces, fabric patterns, and skin surface area in medicine. Burn-injury severity is often described as a percentage of total body surface area, but specific lesions are measured in cm². Small mechanical components, electronic-circuit footprints, and laboratory specimens routinely use square centimeters. The square centimeter relates to the square millimeter (1 cm² = 100 mm²), the square meter (10,000 cm² = 1 m²), and the square inch (1 cm² ≈ 0.155 in²). Dressmaking patterns, photographic-print sizes, and architectural drawing details use cm² for area calculations.
- Paper and printing sizes
- Biology — leaf, skin or tissue area
- Small-item packaging specs
An A4 sheet is 623.7 cm². A postage stamp is typically 5–8 cm². A credit card is about 46 cm².