Convert Rai to square meters easy and simple
Land measurement in Thailand is not always easy to understand especially not as a foreigner who’s used to work with either the Metric or the Imperial measurement systems. The metric system was adopted by Thailand December 1923 but some of the old Thai measurements are still in use today and especially when it comes to measuring land.
Rai, square wah (tarang wah) and Ngan are the terms that Thai people are using in order to determine a given land size and it’s not that difficult to understand when first getting to understand the basics. The metric system is being used when it come to measuring the usable area of a property and often it includes both the inside of a house, driveway, terraces and swimming pool area (usable area). In many cases when it comes to older houses it is not unusual that the square meters are just an estimation as the chanote (title deed) only shows the land size in Rai, Ngan and Wah
1 square Wah (tarang Wah) = 4 square meters
1 ngan = 100 square Wah (400 square meters)
1 Rai = 4 Ngan (1,600 square meters)
1 square Wah is also known as 1 tarang Wah
1 square meter is also known as 1 tarang met
More information about the Thai measurement units can be found at the Wikipedia website
Below you can convert Rai to square meters easy and simple
| SQ. WAH | SQ. FT. | SQ. M. | NGAN | RAI | ACRE(S) | HECTARE(S) |
| 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 | 8.00 | 3.20 | ||
| 48,000 | 120 | 30 | 12.00 | 4.80 | ||
| 64,000 | 160 | 40 | 16.00 | 6.40 | ||
| 80,000 | 200 | 50 | 20.00 | 8.00 | ||
| 96,000 | 240 | 60 | 24.00 | 9.60 | ||
| 112,000 | 280 | 70 | 28.00 | 11.20 | ||
| 128,000 | 320 | 80 | 32.00 | 12.80 | ||
| 144,000 | 360 | 90 | 36.00 | 14.40 | ||
| 160,000 | 400 | 100 | 40.00 | 16.00 |
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Land plot of 3 Rai / 1 Ngan / 65 square wahi = Total 5,460 Square meters land plot
