Thailand has a unique way of measuring land area. Here is a chart to demonstrate the terms and measurement conversions:
1 Talang Mett = 1 Square Meter = 10.7 Square Feet
1 Talang Wah = 4 Square Meters = 42.7 Square Feet
1 Ngan = 100 Talang Wah = 400 Square Meters = 4,277 Square Feet
1 Rai = 4 Ngan = 400 Talang Wah = 1,600 Square Meters = 17,222 Square Feet
1 Acre = 2.5 Rai = 10 Ngan = 1,000 Talang Wah = 4,000 Square Meters = 43,560 Square Feet
*conversion figures are approximate and intended for reference only