01
Length Converter
Converts between 15 length and distance units instantly, showing the exact conversion factor…
Ngan to Square metre
Converts ngan to square metre with the exact defined factor. One ngan is 400 square metre.
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Enter a value to convert.
In short
One ngan is 400 square metre, so to convert ngan to square metre you multiply by 400, and to go back you multiply square metre by 0.0025. 2 ngan is 800 square metre, 5 is 2000 and 10 is 4000. A ngan is 400 m2 exactly — a quarter of a rai and a hundred square wah. It has no equivalent anywhere else, which is why Thai plot sizes have to be read as a set of three numbers rather than converted one at a time. The ngan is used in Thailand, as the middle unit of the rai / ngan / square wah system used on every title deed.
How to use the Ngan to Square metre
- Type the value you want to convert.
- Pick the unit you are converting from and the unit you want.
- The converted value and the exact conversion factor are shown instantly.
About the Ngan to Square metre
A ngan is 400 m2 exactly — a quarter of a rai and a hundred square wah. It has no equivalent anywhere else, which is why Thai plot sizes have to be read as a set of three numbers rather than converted one at a time.
What people use it for
- Reading a listing or a document quoted in ngan.
- Checking a figure someone else converted.
- Getting the exact factor to reuse in a spreadsheet.
Details
| 1 Ngan | 400 Square metre |
|---|---|
| 1 Square metre | 0.0025 Ngan |
| Definition | 1 ngan = 400 m2 = 100 square wah, and 4 ngan = 1 rai. |
| Used in | Thailand, as the middle unit of the rai / ngan / square wah system used on every title deed |
| Conversion type | Exact multiplication — both units are defined against the Square metre |
The maths behind it
This tool uses square metre = ngan × 400, an exact defined factor with no offset. Every intermediate value is shown on screen, so the result can be checked by hand.
1 ngan = 400 m2 = 100 square wah, and 4 ngan = 1 rai.
Frequently asked questions
Is a ngan a quarter of a rai?
Exactly a quarter, yes. 1 rai is 1600 m2 and 1 ngan is 400 m2, so four ngan make a rai with nothing left over.
What is the exact factor?
One ngan is 400 square metre, and one square metre is 0.0025 ngan. It is a defined value rather than a measurement, so it does not change and the conversion is exact in both directions.
Do I need an account to use the Ngan to Square metre?
There is no cost and no cap. The Ngan to Square metre is not a demo of a paid product, so nothing is held back or watermarked.
Can you see what I put into this page?
No. The Ngan to Square metre runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
What formula does the Ngan to Square metre use?
It uses square metre = ngan × 400, an exact defined factor with no offset. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Give me a worked example.
Enter 10 ngan and the Ngan to Square metre returns 4000 square metre.
Who is the Ngan to Square metre for?
Typical uses: reading a listing or a document quoted in ngan. Checking a figure someone else converted. Getting the exact factor to reuse in a spreadsheet. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything to watch out for?
1 ngan = 400 m2 = 100 square wah, and 4 ngan = 1 rai.
Which values should I know?
1 Ngan is 400 Square metre. 1 Square metre is 0.0025 Ngan. Definition is 1 ngan = 400 m2 = 100 square wah, and 4 ngan = 1 rai.. These are printed on the page itself, so you do not have to take them on trust.
Can I rely on this for exact work?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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