ReThai

Rai to square metres

1 rai = 1,600 square metres. Enter rai (or rai-ngan-wah) to get square metres; switch the unit to m² to go back.

A number in the chosen unit, or the size as the title deed writes it: 2 rai 1 ngan 50 wah, 2-1-50, 2 ไร่ 1 งาน 50 ตร.ว.

In square metres

1,600 m²

1 rai · 1-0-0

1 ไร่

rai
1
ngan
4
square wah
400
square metres
1,600
square feet
17,222.26
acres
0.3954
hectares
0.16

1 rai = 1,600 m² = 0.3954 acres = 1 rai

Rai to square metres

RaiSquare metres
0.25 rai400 m²
0.5 rai800 m²
1 rai1,600 m²
1.5 rai2,400 m²
2 rai3,200 m²
3 rai4,800 m²
5 rai8,000 m²
10 rai16,000 m²
20 rai32,000 m²
50 rai80,000 m²
100 rai160,000 m²

Square metres to rai

Square metresRaiRai-ngan-wah
100 m²0.062525 square wah
200 m²0.12550 square wah
500 m²0.31251 ngan 25 square wah
800 m²0.52 ngan
1,000 m²0.6252 ngan 50 square wah
2,000 m²1.251 rai 1 ngan
3,000 m²1.8751 rai 3 ngan 50 square wah
5,000 m²3.1253 rai 50 square wah
10,000 m²6.256 rai 1 ngan

Worked example

A land listing in Chiang Mai is 3.75 rai.

  1. 3.75 × 1,600 = 6,000 m²
  2. On the title deed: 3 rai, then 0.75 rai × 4 = 3 ngan, so 3-3-0
  3. At an asking price of ฿9,000,000, that is ฿9,000,000 ÷ 6,000 = ฿1,500 per m², or ฿2,400,000 per rai.

Questions

How many square metres is 1 rai?
Exactly 1,600 m². A rai is 40 × 40 metres if you picture it as a square.
How do I convert square metres to rai?
Divide by 1,600. 2,400 m² ÷ 1,600 = 1.5 rai, which the land office writes as 1 rai 2 ngan (1-2-0).
Why does a listing say 1-0-0 instead of 1 rai?
Title deeds give land as rai-ngan-square wah. 1-0-0 is 1 rai, 0 ngan, 0 square wah: 1,600 m².
Is a rai the same everywhere in Thailand?
Yes. It is a legal unit with one size, 1,600 m², across the country.

Rai to acres

How many acres is a plot measured in rai?

Price per m² calculator

What does a property cost per square metre or square foot, and how does that compare with the area?

All tools · Guides to buying in Thailand

Information may be inaccurate or out of date.