Free Tools

Convert Every Unit: Length, Area, Mass, Volume, Temperature, Rai, Ngan, Wa and More

Enter a number and pick the source unit. The target list then shows only units of the same kind: choose feet and you are left with length units. Type to search for a unit, tap a number to copy it, or tap a unit name to make it the target.

Thai units use the standard metric values: 1 rai = 1,600 m² = 4 ngan, 1 ngan = 100 square wa, 1 square wa = 4 m², gold 1 baht = 15.244 g (1 salueng = ¼ baht), 1 tang = 20 L. Check against the standard that applies before using them in a contract, land sale or gold trade.

FAQ

What can I convert?

15 categories: length, area, volume, mass, temperature, time, speed, pressure, energy, power, digital data, angle, frequency, force and fuel economy, with both Thai and international units.

Why does the target list get shorter?

Because units of different kinds cannot be converted into each other: feet to kilograms has no meaning. After you pick the source unit, the target list shows only units of the same kind.

How many square wa are in one rai?

1 rai = 400 square wa = 4 ngan = 1,600 square metres.

How are temperature and fuel economy different?

Celsius and Fahrenheit are not related by a plain multiplication, they also need an offset, and litres per 100 km is the inverse of km per litre. This tool handles both correctly.

Is the result rounded?

Automatic mode shows up to 8 significant digits, or choose 0 to 6 decimals. Copied values are plain digits with no thousands separators.