# Unit Converter: Tatami mats (m2, sq. ft., Jō)

• Convert tatami units such as Metric system, United States customary units / Imperial units, and Jō to each other.
• Round to the 14th decimal place.

 square meter m2
 square foot sq.ft.
 tsubo 坪

### 畳 / 帖 (jō)

 Jō (帖) 帖
 Kyōma (京間) 畳
 Chūkyōma (中京間) 畳
 Edoma (江戸間) 畳
 Danchima (団地間) 畳
 6-2 ma (六二間) 畳
 6-1 ma (六一間) 畳
* About the notation of "e": Numbers with many digits may be displayed as "1e9". This is a computer exponential notation, where “e” represents a power of 10.
1e3 = 103 = 1,000
1e6 = 106 = 1,000,000
1e9 = 109 = 1,000,000,000
1e-3 = 10-3 = 0.001
1e-6 = 10-6 = 0.000001
1e-9 = 10-9 = 0.000000001

## Tatami mats conversion formula

Convert based on square meters.

$1 sq \ ft = 0.09290304 m^2$ $1\text{坪} = {\dfrac {400}{121}} m^2 \approx 3.305785 m^2$

#### Jō (帖)

$1\text{帖} = 1.62 m^2$

#### Kyōma (京間)

$1\text{畳} = 3\text{尺}1\text{寸}5\text{分} \times 6\text{尺}3\text{寸}\\ (\approx 955mm \times 1910mm = 1.82405 m^2)$

#### Chūkyōma (中京間)

$1\text{畳} = 3\text{尺} \times 6\text{尺}\\ (\approx 910mm \times 1820mm = 1.6562 m^2)$

#### Edoma (江戸間)

$1\text{畳} \approx 2\text{尺}9\text{寸} \times 5\text{尺}8\text{寸}\\ (\approx 880mm \times 1760mm = 1.5488 m^2)$

#### Danchima (団地間)

$1\text{畳} = 2\text{尺}8\text{寸} \times 5\text{尺}6\text{寸}\\ (\approx 850mm \times 1700mm = 1.445 m^2)$

#### 6-2 ma / Roku-ni-ma (六二間)

$1\text{畳} = 3\text{尺}1\text{寸} \times 6\text{尺}2\text{寸}\\ (\approx 940mm \times 1880mm = 1.7672 m^2)$

#### 6-1 ma / Roku-ichi-ma (六一間)

$1\text{畳} = 3\text{尺}5\text{寸} \times 6\text{尺}1\text{寸}\\ (\approx 925mm×1850mm = 1.71125 m^2)$