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Measurements and Conversions

Plots of land are sub-divided in a rural Thai area
Land survey in the countryside

Thai Units of Measure

Generally speaking, the metric system is commonly used in Thailand for weights and measurements. However, especially in the case of surface measurements (only seldom with linear measurements) the old traditional Thai units of measure are still being used. These are in a symmetric correlation to western measures and can easily be converted.

On title deeds (landownership documents) the sizes of areas are exclusively expressed in Thai units of measure. Here we offer a little help to make the conversion easier for you:

Square measurements

sq. Wah sq. ft. sq. m. Ngan Rai Acres Hectares
1 43 4        
100 4,305 400 1 0.25 0.10 0.04
400 17,222 1,600 4 1 0.40 0.16
800 34,444 3,200 8 2 0.80 0.32
1,200 51,667 4,800 12 3 1.20 0.48
1,600 68,888 6,400 16 4 1.60 0.64
2,000 86,111 8,000 20 5 2.00 0.80
2,400 103,333 9,600 24 6 2.40 0.96
2,800 120,555 11,200 28 7 2.80 1.12
3,200 137,777 12,800 32 8 3.20 1.28
3,600 155,000 14,400 36 9 3.60 1.44
4,000 172,222 16,000 40 10 4.00 1.60
    32,000 80 20 8 3.20
    48,000 120 30 12 4.80
    64,000 160 40 16 6.40
    80,000 200 50 20 8.00
    96,000 240 60 24 9.60
    112,000 280 70 28 11.20
    128,000 20 80 32 12.80
    144,000 360 90 36 14.40
    160,000 400 100 40 16.00