Rai to Ngan Converter
Convert Rai to Ngan instantly. This is useful when reading Thai land measurements or breaking a larger plot into the traditional Thai units.
Calculator
Conversion formula
1 Rai = 4 Ngan
Examples
2 Ngan
4 Ngan
10 Ngan
40 Ngan
How to use this converter
Enter the amount of Rai above. The result in Ngan updates instantly in your browser. The calculator works on mobile and desktop without sending your conversion input to a ThailandCalc application database.
For several Thai and international land units at once, return to the full ThailandCalc land-area converter.
Understanding Rai and Ngan in Thai land measurements
Ngan (งาน) is the middle-sized unit in the traditional Thai land system. It is useful when a plot is smaller than a full Rai or when an area is written in the common Rai–Ngan–Square Wah format.
The relationship is exact: 1 Rai equals 4 Ngan. Each Ngan equals 100 Square Wah or 400 m², so 4 Ngan equals 1,600 m².
Rai to Ngan reference values
1 Ngan
2 Ngan
3 Ngan
4 Ngan
6 Ngan
10 Ngan
Reading a Rai–Ngan–Square Wah land description
A Thai plot might be described as 1 Rai 2 Ngan 50 Square Wah. The Ngan portion is not a decimal fraction of a Rai written arbitrarily: 2 Ngan is exactly half a Rai. The additional 50 Square Wah is another 200 m².
For a single metric total, that example equals 1,600 + 800 + 200 = 2,600 m². Understanding the unit hierarchy makes title-deed and listing figures much easier to check.
Common unit-system mistakes
- Four Ngan make one Rai; ten Ngan do not.
- One Ngan is 100 Square Wah, not 400 Square Wah.
- A mixed Rai–Ngan–Square Wah figure should be converted component by component when you need a total in m².
Frequently asked questions
How many Ngan are in 1 Rai?
1 Rai equals 4 Ngan.
How many Ngan are in half a Rai?
0.5 Rai equals 2 Ngan.
How many square meters are in 1 Ngan?
1 Ngan equals 400 square meters or 100 Square Wah.
What fraction of a Rai is 1 Ngan?
1 Ngan is one quarter of a Rai.
What is 3 Ngan in Rai?
3 Ngan equals 0.75 Rai.
How many square meters are 2 Ngan?
2 Ngan equal 800 square meters.