Rai (unit)
From Wikipedia, the free encyclopedia
A rai (Thai: ไร่ [râj]) is a unit of area, equal to 1,600 square metres (40 m × 40 m), used for measuring land area. 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 equals 4 ngaan (Thai: งาน [ŋāːn]) or 400 tarangwa (Thai: ตารางวา [tāː.rāːŋ wāː]) aka square wa.
It is commonly used in Thailand and equals 16 are, another unit based on the metre and as commonly used in several countries recognized though not encouraged by the SI. The word also means plantation.
See also
References
- "Units of Measurement". Thailand Guru, a service of Export Quality Services Co., Ltd. Retrieved 15 April 2007. (which uses the name 'waa' instead of 'dtaaraangwaa' for the 'square waa')
- "Thailand Information - Measurement". www.PureThailand.com. Retrieved 15 April 2007. (with spelling variants 'wah' and 'tara[a]ng wah' for 'waa' and 'dtaaraangwaa')
See also
- 1 E+3 m² for a comparison with other areas
- Area metric conversion, British and U.S., Japanese, Chinese, Thai, old French, old Spanish, old Russian, etc.
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