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Tsubo to Square foot
Converts tsubo to square foot with the exact defined factor. One tsubo is 35.5832 square foot.
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Enter a value to convert.
In short
One tsubo is 35.5832 square foot, so to convert tsubo to square foot you multiply by 35.5832, and to go back you multiply square foot by 0.0281032. 2 tsubo is 71.1663 square foot, 5 is 177.916 and 10 is 355.832. A tsubo is exactly 400/121 square metres — an odd-looking fraction that comes from it being defined as the area of two tatami mats, six shaku square. It works out at 3.3058 m2 or 35.583 ft2. The Korean pyeong is the same unit under a different name, which is why a Japanese and a Korean floor area convert to each other one for one. The tsubo is used in Japan, where every property listing, floor plan and construction quote is priced per tsubo.
How to use the Tsubo to Square foot
- 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 Tsubo to Square foot
A tsubo is exactly 400/121 square metres — an odd-looking fraction that comes from it being defined as the area of two tatami mats, six shaku square. It works out at 3.3058 m2 or 35.583 ft2. The Korean pyeong is the same unit under a different name, which is why a Japanese and a Korean floor area convert to each other one for one.
What people use it for
- Reading a listing or a document quoted in tsubo.
- Checking a figure someone else converted.
- Getting the exact factor to reuse in a spreadsheet.
Details
| 1 Tsubo | 35.5832 Square foot |
|---|---|
| 1 Square foot | 0.0281032 Tsubo |
| Definition | 1 tsubo = 400/121 m2 exactly = 3.30579 m2 = 35.583 ft2. A Korean pyeong is identical. |
| Used in | Japan, where every property listing, floor plan and construction quote is priced per tsubo |
| Conversion type | Exact multiplication — both units are defined against the Square metre |
The maths behind it
This tool uses square foot = tsubo × 35.5832, an exact defined factor with no offset. Every intermediate value is shown on screen, so the result can be checked by hand.
1 tsubo = 400/121 m2 exactly = 3.30579 m2 = 35.583 ft2. A Korean pyeong is identical.
Frequently asked questions
Why is a tsubo such an awkward number of square metres?
Because it was not derived from the metre. A tsubo is one square ken, and a ken is six shaku — the traditional Japanese units. When Japan fixed the shaku against the metre as 10/33 m, the tsubo fell out as 400/121 m2 exactly. The fraction is the price of an exact conversion rather than a rounded one.
What is the exact factor?
One tsubo is 35.5832 square foot, and one square foot is 0.0281032 tsubo. It is a defined value rather than a measurement, so it does not change and the conversion is exact in both directions.
Is the Tsubo to Square foot free, or is there a paid tier?
It is free, with no account, no trial and no daily cap. Every converters tool on inputtesthub.com works the same way: open the page and use it.
Does anything I enter leave my computer?
No. The Tsubo to Square foot 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 is the equation behind the Tsubo to Square foot?
It uses square foot = tsubo × 35.5832, 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.
What does a typical result look like?
Enter 10 tsubo and the Tsubo to Square foot returns 355.832 square foot.
What problem does the Tsubo to Square foot solve?
The most common reasons people reach for it: reading a listing or a document quoted in tsubo. 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.
What do people usually get wrong here?
1 tsubo = 400/121 m2 exactly = 3.30579 m2 = 35.583 ft2. A Korean pyeong is identical.
What are the key numbers for the Tsubo to Square foot?
1 Tsubo is 35.5832 Square foot. 1 Square foot is 0.0281032 Tsubo. Definition is 1 tsubo = 400/121 m2 exactly = 3.30579 m2 = 35.583 ft2. A Korean pyeong is identical.. These are printed on the page itself, so you do not have to take them on trust.
Is the number rounded?
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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