Square Miles to Ngan (Thai) (mi² to ngan)

1 square mile equals 6,474.970276 ngan (Thai) (rounded).

1 square mile = 6,474.970276 ngan (Thai)

How to convert square miles to ngan (Thai)

To convert square miles to ngan (Thai), multiply the number of square miles by 6,474.970276. The factor is rounded to 10 significant digits. To go the other way, multiply ngan (Thai) by 0.0001544408634 (rounded).

ngan (Thai) = square miles × 6,474.970276

Example: 10 square miles = 64,749.70276 ngan (Thai).

About these units

Square Mile (mi²)

US & ImperialCurrent unit

640 acres or about 2.59 km². Used for the area of cities, states and countries in the US and UK.

A thousand Roman paces, mille passus, became the mile, and under Elizabeth I Parliament fixed the statute mile at eight furlongs, or 5,280 feet, in place of the older Roman-based value. The square mile inherits that length. Its most famous use came in the United States: the Land Ordinance of 1785 started the Public Land Survey System so that western land could be surveyed and sold to pay war debts, beginning with the Seven Ranges in eastern Ohio.

In that system a section is roughly one square mile, or 640 acres, and a township is 36 sections in a square six miles on a side. One square mile is nearly 2.59 million square meters. Chicago's Midway International Airport, at about 650 acres, covers roughly 1.02 square miles. Beware the phrase mile square: a region 20 miles square has 400 square miles, but so does a rectangle 10 by 40 miles. The US survey version of the mile was retired from 1 January 2023, but the international square mile remains the unit for cities, states and countries in the US and UK.

1 square mile = 2,589,988.11 square meters (approximately).

Sources: Wikipedia: Square mile; Wikipedia: Public Land Survey System; Wikipedia: Mile

Ngan (Thai) (ngan)

ThaiTraditional unit (still used in some regions)

A quarter of a rai: exactly 400 m². Used for house plots in Thailand.

Ngan means work in Thai, and as a land unit it is the middle step between the rai and the square wa. Four ngan make one rai, and one ngan holds 100 square wa, so it covers 400 square meters, the area of a square 20 meters on a side.

That size suits a village or suburban house plot, which is why ngan crop up in listings for building land, while farms are quoted in rai. Deeds combine the units, so a title might read as a number of rai, then ngan, then square wa.

The ngan comes from the same traditional Thai scheme as the wa and sen, fixed against metric lengths after the cadastral survey of 1896. Its 400 square meters are exact in the modern definition, and it is about one tenth of an acre.

1 ngan (Thai) = 400 square meters (exactly).

Sources: Wikipedia: Rai (unit); Wikipedia: Thai units of measurement

Related conversions

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