# Does Thailand use inches or centimeters?

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Thailand adopted the metric system on 17 December 1923. However, old Thai units are still in common use, especially for measurements of land.

## How is Thailand measured?

Thailand does not have an Imperial or Metric system.

1. 1 sq. wah = 4 sq. m. 1 acre = 2.529 rai or 43,560 sq. ft.
2. 1 ngan = 100 wah (or 400 sq. m.) 1 hectare = 6.25 rai or 10,000 sq. m.
3. 1 Rai = 4 Ngan (or 1600 sq. m.)

## How do Thai people measure height?

Officially Thailand uses the metric system of measurement for units and weights. However, distance, size, area and weight are frequently quoted in either Imperial (pounds, yards, feet and inches) or metric (kilogrammes, metres and centimetres).

## What is a wah in Thailand?

A tarang wa (Thai: ตารางวา, RTGS: tarang wa, IPA: [tāːrāːŋ wāː]) or square wa, sometimes transliterated as ‘waa’ or ‘wah’ is a unit of area used in Thailand for measuring land or property. It is defined as the area of a square whose sides measure exactly one wa (two metres), equivalent to four square metres.

## Why is America not metric?

The biggest reasons the U.S. hasn’t adopted the metric system are simply time and money. When the Industrial Revolution began in the country, expensive manufacturing plants became a main source of American jobs and consumer products.

## Who invented inches?

The old English ynce was defined by King David I of Scotland about 1150 as the breadth of a man’s thumb at the base of the nail. To help maintain consistency of the unit, the measure was usually achieved by adding the thumb breadth of three men—one small, one medium, and one large—and then dividing the figure by three.

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## Will the US ever go metric?

The United States has official legislation for metrication; however, conversion was not mandatory and many industries chose not to convert, and unlike other countries, there is no governmental or major social desire to implement further metrication.

## What scale is being used in Thailand?

Thailand adopted the metric system on 17 December 1923. However, old Thai units are still in common use, especially for measurements of land. Before metrication, the traditional system of measurement used in Thailand employed anthropic units.