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Quick comparison table
Tap any row to send that value to the converter above.
| rai | hectares | rai-ngan-wah |
|---|---|---|
| 1 | 0.16 | 1-0-0 |
| 2 | 0.32 | 2-0-0 |
| 5 | 0.8 | 5-0-0 |
| 10 | 1.6 | 10-0-0 |
| 50 | 8 | 50-0-0 |
| 100 | 16 | 100-0-0 |
How the calculation works
A hectare is 10,000 square metres, while a rai is 1,600 square metres — so converting rai to hectares means multiplying by 0.16, or dividing by 6.25. The unit shows up most often in cultivated-area reports, international agricultural statistics, and export paperwork that follows the metric standard.
Example: a 20-rai rubber plantation equals 3.2 hectares. When a form or report calls for hectares, that is the figure to enter directly, with no further rounding needed.
See also: Hectares → rai, Rai → acres
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Frequently asked questions
How many hectares is one rai?
One rai is 0.16 hectares — 1,600 square metres divided by 10,000 square metres per hectare.
How many hectares is 5 rai?
5 rai equals 0.8 hectares — the same multiply-by-0.16 rule applies to any rai figure.
Why convert to hectares at all?
Hectares are the international standard used in agricultural, forestry and environmental reporting. Conversion is needed whenever Thai land figures have to line up with data from outside Thailand.