The measurements used to measure land in Thailand are quite different from what is obtained in Europe, United Kingdom or in the United States. Land size is often indicated in the local Thailand measurement units. These are;
1. Wah
2. Talang Wah
3. Rai
Outlined below is the conversion chart, this would assist you in calculating your land sizes accurately.

Metric to Thai
• 1 m = 0.5 Wah
• 1 sqm = 0.25 Talang Wah
• 1 Acre = 2.53 Rai
• 1 Hectare = 6.25 Rai

Thai to Metric
• 1 Wah = 2 m
• 1 Talang Wah = 4 sqm
• 1 Rai = 1600 sqm
• 1 Rai = 400 Talang Wah
• 1 Rai = 0.40 Acre (approx.)
• 1 Rai = 0.16 Hectare
• 1 Ngan = 100 Talang Wah