A
ngaan (
ThaiThai is the national and official language of Thailand and the mother tongue of the Thai people, Thailand's dominant ethnic group. Thai is a member of the Tai group of the Kradai language family. The Kradai languages are thought to have originated in what is now southern China, and are linked to...
งาน) is a unit of
areaArea is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of the areas of the exposed sides of a polyhedron...
, equal to 400
square metreThe square metre is the SI derived unit of area, with symbol m2. It is defined as the area of a square whose sides measure exactly one metre...
s (20 m × 20 m), used for measuring land or property area. Its current size is precisely derived from the
metreThe metre or meter is the basic unit of length in the International System of Units . Historically, the metre was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to represent one ten-millionth of the distance from the Equator...
, but is neither part of nor recognized by the modern
metric systemThe metric system is an international decimalised system of measurement, first adopted by France in 1791, that is the common system of measuring units used by most of the world. It exists in several variations, with different choices of fundamental units, though the choice of base units does not...
, the
International SystemSi, si, or SI may refer to :- Places :* Mount Si, a mountain in state of Washington* Si County, county in Anhui, China* Si River, a river in China* Slovenia, a European nation Si, si, or SI may refer to (all SI unless otherwise stated):- Places :* Mount Si, a mountain in state of Washington* Si...
(SI).
A
ngaan (
ThaiThai is the national and official language of Thailand and the mother tongue of the Thai people, Thailand's dominant ethnic group. Thai is a member of the Tai group of the Kradai language family. The Kradai languages are thought to have originated in what is now southern China, and are linked to...
งาน) is a unit of
areaArea is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of the areas of the exposed sides of a polyhedron...
, equal to 400
square metreThe square metre is the SI derived unit of area, with symbol m2. It is defined as the area of a square whose sides measure exactly one metre...
s (20 m × 20 m), used for measuring land or property area. Its current size is precisely derived from the
metreThe metre or meter is the basic unit of length in the International System of Units . Historically, the metre was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to represent one ten-millionth of the distance from the Equator...
, but is neither part of nor recognized by the modern
metric systemThe metric system is an international decimalised system of measurement, first adopted by France in 1791, that is the common system of measuring units used by most of the world. It exists in several variations, with different choices of fundamental units, though the choice of base units does not...
, the
International SystemSi, si, or SI may refer to :- Places :* Mount Si, a mountain in state of Washington* Si County, county in Anhui, China* Si River, a river in China* Slovenia, a European nation Si, si, or SI may refer to (all SI unless otherwise stated):- Places :* Mount Si, a mountain in state of Washington* Si...
(SI).
The ngaan equals 1/4
raiA rai is a unit of area, equal to 1,600 square metres , 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 ....
or 100 dtaaraangwaa
aka square
waaA waa is a unit of length, equal to 2 metres . Its current size is precisely derived from the metre, but is neither part of nor recognized by the modern metric system, the International System ....
.
It is commonly used in
ThailandThe Kingdom of Thailand is an independent country that lies in the heart of Southeast Asia.It is bordered to the north by Laos and Burma, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and Burma...
and equals 4
areAre is a unit of area, equal to 100 square metres , used for measuring land area. It was defined by older forms of the metric system, but is now outside of the modern International System...
, another unit based on the metre and as commonly used in several countries recognized though not encouraged by the SI.
As for many terms normally written in
Thai alphabetThe Thai alphabet is used to write the Thai language and other minority languages in Thailand. It has forty-four consonants , fifteen vowel symbols that combine into at least twenty-eight vowel forms, and four tone marks .The character set is an abugida, a writing system in which each consonant may...
, transliteration into English language caused a spelling variant,
ngan.