Thai Land Measurements | SunwayEstates
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Thai Land Measurements

Thailand has its own system of area unit measurements. While metric system has been adopted for almost a century - since December 17th 1923 - traditional measurements are still widely used, especially when it comes to land. Here are the basics:

  • Tarang wah (square wah). Wah is a unit of length equal to 2 metres, so 1 square wah equals to 4 square meters.
  • Ngan. 1 ngan = 100 square wah = 400 sqm
  • Rai. 1 Rai = 4 ngan = 400 square wah = 1600 sqm

There is also a specific format used for land sizes, for example, when land size is stated as 2-1-10, it means: ‘2 Rai, 1 ngan, 10 sq. wah.’ (21600 + 1400 + 10*4 = 3640 sqm).

Here is a quick conversion guide:

Square Meters Square Feet Square Wah Ngan Rai Acre Hectare
1 10.76 0.25 0.0025 0.000625 0.00025 0.0001
4 43 1 0.01 0.0025 0.00099 0.0004
9.3 100 2.3 0.023 0.0058 0.00230 0.00093
10 108 2.5 0.025 0.00625 0.00247 0.001
93 1000 23 0.23 0.058 0.023 0.0093
100 1076 25 0.25 0.0625 0.025 0.01
400 4306 100 1 0.25 0.099 0.04
800 8611 200 2 0.5 0.198 0.08
929 10000 232 2.32 0.581 0.230 0.0929
1000 10764 250 2.5 0.625 0.247 0.1
1600 17222 400 4 1 0.395 0.16
2023 21780 506 5.06 1.265 0.5 0.2023
4047 43560 1012 10.12 2.529 1 0.4047
10000 107639 2500 25 6.25 2.47 1
100000 1076390 25000 250 62.5 24.71 10