ReThai

Rai to acres

1 rai = 0.3954 acres; 1 acre = 2.529 rai. Enter rai to get acres, or switch the unit to acres 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 acres

0.3954 acres

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 acres

RaiAcresHectares
1 rai0.39540.16
2 rai0.79070.32
2.53 rai10.4048
5 rai1.9770.8
10 rai3.9541.6
15 rai5.9312.4
20 rai7.9073.2
25 rai9.8844
50 rai19.7688
100 rai39.53716

Acres to rai

AcresRaiRai-ngan-wah
0.25 acres0.63232 ngan 52.93 square wah
0.5 acres1.2651 rai 1 ngan 5.86 square wah
1 acre2.5292 rai 2 ngan 11.71 square wah
2 acres5.0595 rai 23.43 square wah
5 acres12.64612 rai 2 ngan 58.57 square wah
10 acres25.29325 rai 1 ngan 17.14 square wah
20 acres50.58650 rai 2 ngan 34.28 square wah

Worked example

A farm near Hua Hin is offered as 12 rai. A buyer from Australia thinks in acres.

  1. 12 rai × 1,600 = 19,200 m²
  2. 19,200 ÷ 4,046.86 = 4.74 acres
  3. Shortcut: 12 × 0.4 = 4.8 acres, close enough to judge the size at a glance.

Questions

How many acres is 1 rai?
1 rai is 0.3954 acres (1,600 m² ÷ 4,046.86 m²). Roughly, 5 rai is 2 acres.
How many rai is 1 acre?
1 acre is 2.529 rai, or 2 rai 2 ngan 11.7 square wah on a Thai title deed.
What is a quick way to convert rai to acres in my head?
Multiply the rai by 0.4. It overstates by about 1%: 10 rai is 3.95 acres, the shortcut gives 4.
Which acre is used here?
The international acre of 43,560 square feet (4,046.8564224 m²), used in the US, UK, Australia and Canada.

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Information may be inaccurate or out of date.