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Tsubo Area Converter

Convert between tsubo, square meters (㎡), tatami mats and square feet. Tatami size is selectable by region (Chukyoma, Edoma, Kyoma, Danchima).

Last updated: 2026/10/16 Calculator Feedback & bug reports
Enter the area to convert
Tatami standard (region)
Results
Tsubo 0
㎡ 0
Tatami 0
ft² 0

How to Use

1

Enter value and unit

Type the area value and choose its unit (tsubo, ㎡, tatami or square feet).

2

Select tatami standard

For tatami conversions, pick the regional standard (Chukyoma, Edoma, Kyoma or Danchima).

3

View and copy results

All units are converted instantly as you type. Copy any result with a single tap.

About the Tsubo Area Converter

A web tool that converts between the Japanese units "tsubo" and "tatami (jo)" and the international units "square meters (㎡)" and "square feet". One tsubo equals about 3.3058 ㎡, the size of two tatami mats. Because tatami sizes differ by region, you can choose from four standards (Chukyoma, Edoma, Kyoma, Danchima) for accurate conversion. All calculations run in your browser and your input is never sent to a server.

Features

  • Real-time conversionConverts to tsubo, ㎡, tatami and square feet instantly as you type.
  • Regional tatami supportChoose from four tatami standards: Chukyoma, Edoma, Kyoma and Danchima.
  • One-tap copyCopy any converted value to the clipboard with a single tap.
  • Privacy protectedAll processing happens in your browser. Input is never sent to servers.

Use Cases

  • Understand property sizes by converting ㎡ listings to tsubo and tatami
  • Visualize room sizes in tatami counts
  • Convert land size in tsubo to ㎡ for contracts and registration
  • Convert overseas listings (square feet) to ㎡ and tatami
  • Area calculations for renovation and furniture layout

FAQ

How many square meters is 1 tsubo?
One tsubo is approximately 3.3058 ㎡ (exactly 400/121 ㎡), equal to two tatami mats. Conversely, 1 ㎡ is about 0.3025 tsubo.
How large is one tatami mat, and why does it vary by region?
Tatami size varies by region and standard. Kyoma (1.91×0.955m = ≈1.8241 ㎡) is the largest, followed by Chukyoma (≈1.6562 ㎡), Edoma (≈1.5488 ㎡) and Danchima (≈1.4450 ㎡). This comes from historical building practices, and you can choose the standard in this tool.
Is my input sent to a server?
No. All conversions run entirely in your browser, and your input is never sent to or stored on any server.
Can it convert square feet too?
Yes. It uses 1 square foot ≈ 0.0929 ㎡ (1 ㎡ ≈ 10.764 square feet), which is handy for converting overseas listings to ㎡, tsubo and tatami.
How many tsubo and tatami is a property of "X ㎡"?
Choose "Square meters (㎡)" as the unit and enter the area to instantly see tsubo, tatami and square feet. For example, 60 ㎡ is about 18.15 tsubo, or roughly 36.2 tatami in Chukyoma.

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Unit Conversion Basics: Length, Weight, Temperature & Area Made Simple A clear guide to converting length (m/inch/ft), weight (kg/lb/oz), temperature (Celsius/Fahrenheit), and area (m²/tsubo/tatami). Learn the key reference numbers, the Fahrenheit-Celsius formula, and where conversions come up daily.