Convert rais to square kilometers

1 rai=0.0016km²

Use the converter below to change any rais value into square kilometers instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.0016

Conversion formula

Forward

square kilometers = rais × 0.0016

Reverse

rais = square kilometers × 625

Example: 10 rai × 0.0016 = 0.016 km².

About both units

From

Rai

rai

The rai equals 1600 square metres exactly — the traditional Thai land unit. It is 1/6.25 of a hectare. Still widely used in Thai property transactions and agricultural documents. A rai is subdivided into 4 "ngan" (400 m² each).

Real-world: A small Thai farm might be 10–20 rai (1.6–3.2 ha). Thai rice yields: 400–600 kg per rai.

Read full rai reference →

Square Kilometer

km²

The square kilometre equals 1,000,000 m² or 100 hectares. It is used for city, region and country areas. Greater London is about 1572 km². The smallest sovereign countries (Monaco, Vatican City) are under 3 km² each.

Real-world: Greater London is 1572 km². France is 643,801 km². The Serengeti National Park is 14,763 km².

Read full square kilometer reference →

Rai to Square Kilometer conversion table

Common rais to square kilometers values for quick reference.

Rai (rai)	Square Kilometer (km²)
1 rai	0.0016 km²
5 rai	0.008 km²
10 rai	0.016 km²
50 rai	0.08 km²
100 rai	0.16 km²
500 rai	0.8 km²
1,000 rai	1.6 km²
5,000 rai	8 km²
10,000 rai	16 km²
50,000 rai	80 km²

Tips & common mistakes

Quick tips

1 rai = 1600 m² = 0.16 ha.
1 rai = 4 ngan = 400 tarang wa.
1 hectare = 6.25 rai.

Avoid these

Assuming rai equals hectare — only 16%.
Mixing rai with ngan or tarang wa without conversion.
Using rai outside Thailand — not internationally recognised.

Frequently asked questions

How many square kilometers in a rai?

One rai equals 0.0016 square kilometers.

How do I convert rais to square kilometers?

Multiply the rai value by 0.0016 to get the equivalent in square kilometers.

What is 100 rais in square kilometers?

100 rais equals 0.16 square kilometers.

Is a rai bigger than a square kilometer?

No. 1 rai equals 0.0016 square kilometers, so one rai is smaller.

How to convert rais to square kilometers without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

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Convert rais to square kilometers

🧮 Conversion formula