Thai units of measurement | Units of area

Rai (unit)

A rai (Thai: ไร่, pronounced [râj]) is a unit of area equal to 1,600 square metres (16 ares, 0.16 hectares, 0.3954 acres), and is used in measuring land area for a cadastre or cadastral map. Its current size is precisely derived from the metre, but is neither part of nor recognized by the modern metric system, the International System (SI). The rai is defined as 1 square sen or (40 m × 40 m). It can be divided in four ngaan or 400 square wa. It is commonly used in Thailand. Although recognized by the SI, its use is not encouraged. The word rai also means plantation. (Wikipedia).

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Related pages

Wa (unit) | Area | Metre | Square metre | Acre | Orders of magnitude (area) | Thai units of measurement | Hectare