Convert tsubo, square metres and tatami
Japanese floor areas made clear: tsubo, jō and m², with totals and the price per tsubo.
Examples temporarily replace the input and settings. You can restore your previous work.
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Output
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Example
Example: how large is a six-tatami room?
A Japanese apartment listing describes a room as 6 jō. Enter 6 jo, select Property listings (1.62 m²) as the tatami size, and use two decimal places.
- Multiply 6 by 1.62 to get 9.72 m².
- The converter also expresses the same floor area in square feet and tsubo.
| Unit | Result |
|---|---|
| Square metres | 9.72 m² |
| Square feet | 104.63 sq ft |
| Tsubo | 2.94 |
The listed room is 9.72 m². This example uses the property-listing size; choosing a different tatami size changes the result.
How it works
- Type or paste areas, one per line, such as 30 tsubo, 6 jo, 70 m2 or 1200 sq ft.
- A number without a unit is read in the unit you choose.
- Choose the tatami size: listings in Japan count 1.62 m² per jō; the older mat sizes are there for real rooms.
- Each line shows the other units, and several lines are added up.
Frequently asked questions
- How big is a tsubo?
- Exactly 400/121 m², about 3.306 m², the area of two tatami mats. It is the unit Japanese land and house prices are quoted in; Korea uses the same unit as pyeong.
- Why are there several tatami sizes?
- Mats were made to different sizes in different regions and eras: kyōma in Kyoto is 1.82 m², edoma around Tokyo 1.55 m², the danchima of public housing 1.45 m². To keep adverts comparable, Japanese property listings must count 1.62 m² per jō, which is the default here.
- Can it work out the price per tsubo?
- Yes, for prices in yen: a line such as 3,480万円 25.3坪 gets its price per tsubo and per m². A line with 坪単価 (price per tsubo) and an area gets the total price.
- Is anything sent anywhere?
- No. It is worked out in your browser as you type.
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