Tool: Thai Rai to Wah, Ngan, Hectare, Sqm and Acres | Bangkok Has You
Use this Link to use the Converter:
Here is a cool tool for doing simple conversions
Rai – Tarang Wah – Ngan – Square meter – Hectare – Acre.
The metric system (meters, kilometers) is used extensively, but you can still find the traditional Rai, squared Wah and Ngan. 1 Rai equals to 4 Ngan, which is the same as 400 Square Wah, or 1600 Square Meters.
Source: bangkokhasyou.com/thai-rai-wah-ngan-hectare-sqm-acre-converter-online/
Thai Area Conversion Tool – Rai to Wah, Ngan, Hectare, Sqm and Acres