A tarang wa ( th, ตารางวา, , ) or square
wa, sometimes transliterated as 'waa' or 'wah' is a unit of
area
Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while ''surface area'' refers to the area of an open su ...
used in
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...
for measuring land or property. It is defined as the area of a
square
In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length a ...
whose sides measure exactly one wa (two metres), equivalent to four
square metres.
Although its current size is precisely derived from the metre, it is neither part of nor recognized by the modern
metric system
The metric system is a system of measurement that succeeded the decimalised system based on the metre that had been introduced in France in the 1790s. The historical development of these systems culminated in the definition of the Intern ...
, the
International System (SI).
The square wa equals 1/100
ngaan
A ngan ( th, งาน, , ) is a unit of area, equal to 400 square metres (20 m × 20 m), used for measuring land or property area. Its current size is precisely derived from the metre, but is neither part of nor recognized by the modern metric sy ...
or 1/400
rai, two units of area frequently used in Thailand. It also equals 1/25
are, another metre-derived unit of area not officially part of the SI.
As with many terms normally written with the
Thai alphabet
The Thai script ( th, อักษรไทย, ) is the abugida used to write Thai, Southern Thai and many other languages spoken in Thailand. The Thai alphabet itself (as used to write Thai) has 44 consonant symbols ( th, พยัญชน� ...
, there are many variant
transliteration
Transliteration is a type of conversion of a text from one script to another that involves swapping letters (thus ''trans-'' + '' liter-'') in predictable ways, such as Greek → , Cyrillic → , Greek → the digraph , Armenian → or ...
s into English, e.g. dta-raang waa and tarang wah.
See also
*
Thai units of measurement
Thailand adopted the metric system on 17 December 1923.[Orders of magnitude (area)
This page is a progressive and labelled list of the SI area orders of magnitude, with certain examples appended to some list objects.
to square metres
10−8 to 10−1 square metres
100 to 107 square metres
108 to 1014 square metres
101 ...](_blank)
for a comparison with other areas
References
{{reflist
External links
Area metric conversion British and U.S., Japanese, Chinese, Thai, old French, others.
Geography of Thailand
Units of area
Thai units of measurement