How many square metres is 1 rai?

1 rai is exactly 1,600 square metres: 4 ngan of 400 m² each, or 400 square wah of 4 m² each.

What does 2-1-50 on a Thai title deed mean?

Rai, ngan and square wah, in that order: 2 rai, 1 ngan and 50 square wah, which is 2 × 1,600 + 1 × 400 + 50 × 4 = 3,800 m².

How many rai are in an acre and in a hectare?

1 acre is about 2.529 rai (4,046.86 m²). 1 hectare is exactly 6.25 rai (10,000 m²).

Is a square wah the same as a talang wah or ตารางวา?

Yes. Talang wah and tarang wa are spellings of ตารางวา, the square wah: a square 1 wah (2 metres) on each side, so 4 m².

Thai land unit converter

Type a plot size the way the land office writes it and see it in square metres, acres, square feet and hectares.

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

Thai land units

1 rai = 1,600 m²4 ngan or 400 square wah

1 ngan = 400 m²100 square wah

1 square wah = 4 m²2 m × 2 m

1 rai = 0.3954 acres1 acre = 2.529 rai

1 hectare = 6.25 rai10,000 m²

A wa is exactly 2 metres, so every Thai land unit is an exact number of square metres.

Common plot sizes

Plot	m²	Acres	Sq ft
50 square wah	200	0.04942	2,153
1 ngan	400	0.09884	4,306
1 rai	1,600	0.3954	17,222
2 rai 1 ngan 50 wah	3,800	0.939	40,903
5 rai	8,000	1.977	86,111
10 rai	16,000	3.954	172,223
25 rai	40,000	9.884	430,556

Worked example

A villa plot is listed as 1-2-75 (1 rai 2 ngan 75 square wah).

1 rai × 1,600 = 1,600 m²
2 ngan × 400 = 800 m²
75 square wah × 4 = 300 m²
Total: 2,700 m², which is 0.6672 acres or 29,063 sq ft. Back in Thai units: 1 rai 2 ngan 75 square wah.

Questions

How many square metres is 1 rai?: 1 rai is exactly 1,600 square metres: 4 ngan of 400 m² each, or 400 square wah of 4 m² each.
What does 2-1-50 on a Thai title deed mean?: Rai, ngan and square wah, in that order: 2 rai, 1 ngan and 50 square wah, which is 2 × 1,600 + 1 × 400 + 50 × 4 = 3,800 m².
How many rai are in an acre and in a hectare?: 1 acre is about 2.529 rai (4,046.86 m²). 1 hectare is exactly 6.25 rai (10,000 m²).
Is a square wah the same as a talang wah or ตารางวา?: Yes. Talang wah and tarang wa are spellings of ตารางวา, the square wah: a square 1 wah (2 metres) on each side, so 4 m².

Rai to square metres

How many square metres is a plot measured in rai?

Rai to acres

How many acres is a plot measured in rai?

Square wah to square metres

How many square metres is a plot measured in square wah (talang wah)?

Square metres to square feet

How big is a condo of so many m² in square feet (or ping)?

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.