How Big is 4 Square Meters (43 Sq Ft)? Conversion to Tsubo and Jo (Tatami), with Room Examples
We will explain just how spacious 4 square meters (approx. 43.06 square feet) is, featuring reference photos of hotel rooms, conversions to traditional Japanese units like tsubo and jo, and typical room layouts. Please use this as a helpful guide when staying at a Japanese hotel or renting an apartment or condo in Japan.
In Japanese, “Heibei” (平米) means “area” or “square meters,” and its symbol is “㎡” (m²).
While square meters (heibei) are commonly used for houses, accommodations, and rentals in Japan, you will also frequently encounter unique Japanese units of measurement for area, such as “tsubo” (坪) and “jo” (帖) or “tatami” (畳).
We have also included a conversion showing exactly how many tsubo and jo 4 square meters equates to.
Note that “帖” and “畳” are pronounced the same way (“jo”) and carry the exact same meaning. However, for “畳”, when there is a number in front of it (like 1畳), it is read as “jo” (e.g., ichi-jo), but when the character is used alone without a number, it is read as “tatami”.
4 square meters is a space of about 2.24 meters on each side (2.24 meters long × 2.24 meters wide, or approx. 7.35 ft × 7.35 ft). Therefore, if a building were a perfectly square one-story structure, its frontage would be about 2.24 meters (7.35 feet).
4 square meters is roughly equivalent to the size of two single-sized mattresses placed together. In terms of hotels, this corresponds to a spacious capsule hotel or a cabin-style room. It is an area size you will almost never see in a standard residential home or rental apartment.
Now, let’s take a closer look at 4 square meters. We have also compiled photos for other square meter sizes and reference guides for “jo (tatami)” and “tsubo”, so please feel free to check them out as well.
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What are the dimensions of 4 m², and how does it convert to Tsubo and Tatami (Jo)?
To give you a clearer idea of how big 4 square meters is, we have summarized the following in a table: the length and width in meters (and feet) if it were a perfect square, the conversion to “tsubo” and “tatami (jo)”—which are frequently used in Japan to express room sizes—and the estimated layout of the room.
| Square Meters (m² / sq ft) | Tatami (Jo) | Tsubo | Four Sides (Length × Width) | Layout Estimate |
|---|---|---|---|---|
| 4 m² (43.06 sq ft) | 2.47 Jo | 1.21 Tsubo | Approx. 2.24m × 2.24m (7.35ft × 7.35ft) |
N/A |
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Regarding “jo” (tatami), the standard size of a tatami mat varies depending on the region in Japan. For these calculations, we are using the real estate standard where 1 jo equals 1.62 m² (approx. 17.44 sq ft). For more details, please see “Explanation of Tatami Sizes such as Kyo-ma and Edo-ma”.
Photos of 4 Square Meters
To show you what 4 square meters actually looks like in real life, we took photos of rooms in hotels and traditional inns. Please take a look.
Capsule Hotel Hakodate
This is a capsule hotel located a few minutes’ drive from Hakodate Station. The room we stayed in this time is a 4-square-meter cabin room. It features a space for sleeping as well as a desk area.
Photographed in May 2018.
