Land Unit Conversion

Converting Rai to Square Meters can be complex and can create legal issues when people do not fully understand what a Rai of land is or the building size. It is important to ensure that when you are signing at the contract stage that you know exactly what it is..Also ensure that you understand what you are selling or buying and how best to deal with this. These are the basics for land conversion in the Thai land measurement system. Thailand does not have an Imperial or Metric system.

1 Rai = 4 Ngan (or 1600 sq. m.)

1 sq. wah = 4 sq. m.

1 acre = 2.471 rai or 43,560 sq. ft.

1 ngan = 100 wah (or 400 sq. m.)

1 hectare = 6.25 rai or 10,000 sq. m.

SQ. WAH

SQ. FT.

SQ. M.

NGAN

RAI

ACRE(S)

HECTARE(S)

1

43

4

100

4,305

400

1

0.25

0.10

0.04

400

17,222

1,600

4

1

0.40

0.16

800

34,444

3,200

8

2

0.80

0.32

1,200

51,667

4,800

12

3

1.20

0.48

1,600

68,888

6,400

16

4

1.60

0.64

2,000

86,111

8,000

20

5

2.00

0.80

2,400

103,333

9,600

24

6

2.40

0.96

2,800

120,555

11,200

28

7

2.80

1.12

3,200

137,777

12,800

32

8

3.20

1.28

3,600

155,000

14,400

36

9

3.60

1.44

4,000

172,222

16,000

40

10

4.00

1.60

32,000

80

20

8

3.20

48,000

120

30

12

4.80

64,000

160

40

16

6.40

80,000

200

50

20

8.00

96,000

240

60

24

9.60

112,000

280

70

28

11.20

128,000

320

80

32

12.80

144,000

360

90

36

14.40

160,000

400

100

40

16.00