How it works
Enter the area as rai-ngan-square wa (as on a Thai title deed), as a number in another unit such as m² or acres, or as width × length of a plot or room. You get every unit instantly. Add a land price to get the total and the price in other units.
Formula
1 rai = 4 ngan = 400 square wa = 1,600 m²
1 ngan = 100 square wa = 400 m² · 1 square wa = 4 m²
1 acre = 4,046.86 m² · 1 hectare = 10,000 m² = 6.25 rai · 1 m² = 10.764 sq ft
Square wa → rai-ngan-wa: rai = ⌊sq wa ÷ 400⌋, ngan = ⌊remainder ÷ 100⌋, the rest is square wa
FAQ
How big is a rai in square metres?
1 rai = 4 ngan = 400 square wa = 1,600 m². 1 ngan = 100 square wa = 400 m², and 1 square wa = 4 m² (1 wa = 2 metres).
What does 2-1-35 on a Thai title deed (chanote) mean?
Land area is written as rai-ngan-square wa, so 2-1-35 means 2 rai 1 ngan 35 square wa, which is 935 square wa or 3,740 m².
How many acres or hectares is a rai?
1 rai ≈ 0.395 acres and exactly 0.16 hectares. The other way round, 1 acre ≈ 2.53 rai and 1 hectare = 6.25 rai.
Are Thai land prices quoted per square wa or per rai?
Plots in town and housing estates are usually priced per square wa, while large plots and farmland are priced per rai. Enter either and you get the total and the price in the other units.