Understanding Thailand's Land Measurement System: Rai, Ngan, and Wah Explained

  • calendar 1 month ago

When looking to invest in real estate in Pattaya or other parts of Thailand, it's essential to understand the country's unique land measurement system. Thailand uses a land measurement system based on rai, ngan, and wah. In this comprehensive article, we will explain these units of measurement and how they compare to other international systems.

Thailand's Land Measurement System


The rai is the largest unit of land measurement in Thailand. It is commonly used for larger land areas, such as agricultural land, houses, and villas. One rai is equivalent to 1,600 square meters or approximately 0.40 acres.


The ngan is a smaller unit of measurement, commonly used for medium-sized land plots. One ngan is equivalent to 400 square meters or 0.10 acres. There are four ngan in one rai.


The wah is the smallest unit of land measurement in Thailand. It is used for measuring small land areas. One wah is equivalent to 4 square meters or 0.001 acres. There are 100 wah in one ngan, and 400 wah in one rai.


Converting Thai Land Measurements to International Units

To better understand the size of a property in Thailand, it may be helpful to convert the local measurements to more familiar units like square meters, square feet, or acres. Here are some conversion factors to help you:

  • 1 rai = 1,600 square meters
  • 1 rai = 17,222 square feet
  • 1 ngan = 400 square meters
  • 1 ngan = 4,305 square feet
  • 1 wah = 4 square meters
  • 1 wah = 43 square feet

Using Thai Land Measurements in Property Listings

When browsing Pattaya property listings, you'll often find land measurements in rai, ngan, or wah. It's essential to be familiar with these units to accurately assess the property size and compare it to other properties in the market.

For example, if a condo development is listed as having a land size of 2 rai, 1 ngan, and 50 wah, you can convert this to square meters using the conversion factors mentioned above:

  • 2 rai = 3,200 square meters
  • 1 ngan = 400 square meters
  • 50 wah = 200 square meters

Adding these together, the total land size is 3,800 square meters.


Practical Applications of Thai Land Measurements

Understanding Thailand's land measurement system is crucial when dealing with real estate transactions in the country. Here are some practical applications of this knowledge:

Property Valuation

When determining the value of a property in Thailand, understanding the land measurement system is essential. Land size is a significant factor in a property's value, and it can also impact property taxes.

Comparing Properties

When comparing different properties for sale, it's important to understand the land size to make an informed decision. Knowing the land size in rai, ngan, or wah will help you assess if a property is suitable for your needs or if it is appropriately priced in the market.

Property Development

If you're considering investing in a condo or home development, understanding the land measurement system will help you assess the development's scale and potential. This knowledge is essential when evaluating the potential return on investment (ROI) and deciding whether to invest in a specific project.


Understanding Thailand's unique land measurement system is essential for anyone interested in the country's real estate market. By familiarizing yourself with rai, ngan, and wah, you'll be better equipped to navigate property listings, assess property values, and make informed decisions when buying, selling, or investing in Thai properties.

For more information on Thailand's real estate market, visit the Pearl Property Thailand blog or explore our comprehensive guides to Pattaya real estate and property types. Whether you're interested in a luxurious condo or a serene villa, Pearl Property Thailand has the resources and expertise to help you find your perfect property.


What are the measurements in Thailand?

Thailand uses a unique land measurement system based on rai, ngan, and wah. These units are used to measure land areas for properties like houses, villas, condominiums, and agricultural lands. The conversion factors for these units are as follows:
  • 1 rai = 1,600 square meters
  • 1 ngan = 400 square meters
  • 1 wah = 4 square meters

What is the unit of land in Thailand?

The primary units of land measurement in Thailand are rai, ngan, and wah. Rai is the largest unit, used for larger land areas like agricultural lands and houses. Ngan is a smaller unit, used for medium-sized land plots. Wah is the smallest unit, used for measuring small land areas like townhouses.

How big is an acre in Thailand?

An acre is an international unit of land measurement that is not commonly used in Thailand. However, it can be helpful to know the conversion factors between acres and Thai land measurements. One acre is equivalent to approximately:
  • 2.5 rai
  • 10 ngan
  • 400 wah

You may also be interested in

Why Buying Real Estate in Pattaya City Center is a Smart Investment

Are you considering investing in real estate but unsure where to put your money? Look no further than Pattaya City Center. Known for its beautiful beaches, thriving nightlife, and booming tourism industry, Pattaya has become a hotspot for real estate investment. In this article, we'll delve into why investing in Pattaya City Center's real estate is a smart m...

Is Buying a Condo in Pattaya Worth It? An In-Depth Analysis

Is buying a condo in Pattaya a good investment? This question has become increasingly common as Pattaya's real estate market continues to evolve. In this blog post, we'll take a closer look at the key factors that may influence your decision to buy a condo in Pattaya. From understanding the legalities to considering the future market trends, we've got it all...

price tag