Land and measure
Thailand has its very own units of measurements.
The units you will come across most often are wah, talang wah,ngan and rai.
Thai to Metric
1 Wah = 2 m
1 Talang Wah = 4 sqm
1 Rai = 1600 sqm
1 Rai = 400 Talang Wah
1 Ngan = 100 Talang Wah
Metric to Thai
1 m = 0.5 Wah
1 sqm = 0.25 Talang Wah
1 Acre = 2.5 Rai (approx.)
1 Hectare = 6.25 Rai (approx.)