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Guide to Japanese Floor Space: Understanding “Heibei” (Square Meters)

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Life & Trivia
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In Japan, “Heibei” is a unit used to indicate area in “square meters.” It is one of the most frequently used units to express the floor area of rental apartments, condominiums, hotels, and real estate.

The unit symbol for a square meter is “㎡.” Therefore, “1 Heibei” is equal to “1 square meter” and can be written as “1㎡” (approximately 10.76 square feet).

Heibei (area) is calculated by multiplying the length by the width. For example, an area with a length of 1 meter and a width of 1 meter is 1 x 1 = 1, resulting in “1 Heibei” (1㎡ / 10.76 sq ft). If the length is 2 meters and the width is 3 meters, 2 x 3 = 6, which equals “6 Heibei” (6㎡ / 64.58 sq ft).

In Japan, other commonly used units besides “Heibei” include “Jo” (Tatami mats) and “Tsubo.” While “Heibei” has become more common in recent years, “Jo” and “Tsubo” are still frequently used today.

Since both “Jo” and “Tsubo” are units unique to Japan, they can be difficult to understand. To help, we have created a conversion list from 1 Heibei to 100 Heibei, showing the equivalent values in “Jo” and “Tsubo,” along with typical room layout (floor plan) examples. Note that in Japanese floor plans, K stands for Kitchen, D for Dining, and L for Living. The leading number indicates how many additional rooms are in the unit.

  • 1K: One room plus a separate kitchen.
  • 1DK: One room plus a dining and kitchen area.
  • 1LDK: One room plus a living, dining, and kitchen area.

You can also click or tap on the images to view articles featuring photographs of actual accommodations corresponding to each size.

Please use this as a reference when staying at Japanese Ryokans, hotels, or other lodging facilities.

For more details on “Tatami” and “Tsubo,” please refer to the following articles:

The size of a “Tatami” mat (Jo) varies by region in Japan. Here, we use the standard conversion generally used in real estate: 1 Jo = 1.62 square meters (approx. 17.44 sq ft).

Square Meters (㎡ / sq ft) Jo (Tatami Mats) Tsubo Dimensions (Square) Typical Layout Guide
1 Square Meter
1㎡ (10.76 sq ft)
 0.62 Jo 0.303 Tsubo 1.00m × 1.00m N/A
2 Square Meters
2㎡ (21.53 sq ft)
 1.23 Jo 0.605 Tsubo 1.41m × 1.41m N/A
3 Square Meters
3㎡ (32.29 sq ft)
 1.85 Jo 0.908 Tsubo 1.73m × 1.73m N/A
4 Square Meters
4㎡ (43.06 sq ft)
 2.47 Jo 1.21 Tsubo 2.00m × 2.00m N/A
5 Square Meters
5㎡ (53.82 sq ft)
 3.09 Jo 1.51 Tsubo 2.24m × 2.24m N/A
6 Square Meters
6㎡ (64.58 sq ft)
 3.70 Jo 1.82 Tsubo 2.45m × 2.45m N/A
7 Square Meters
7㎡ (75.35 sq ft)
 4.32 Jo 2.12 Tsubo 2.65m × 2.65m N/A
8 Square Meters
8㎡ (86.11 sq ft)
 4.94 Jo 2.42 Tsubo 2.83m × 2.83m N/A
9 Square Meters
9㎡ (96.88 sq ft)
 5.56 Jo 2.72 Tsubo 3.00m × 3.00m N/A
10 Square Meters
10㎡ (107.64 sq ft)
 6.17 Jo 3.03 Tsubo 3.16m × 3.16m Studio (One Room)
11 Square Meters
11㎡ (118.40 sq ft)
 6.79 Jo 3.33 Tsubo 3.32m × 3.32m Studio (One Room)
12 Square Meters
12㎡ (129.17 sq ft)
 7.41 Jo 3.63 Tsubo 3.46m × 3.46m Studio (One Room)
13 Square Meters
13㎡ (139.93 sq ft)
 8.02 Jo 3.93 Tsubo 3.61m × 3.61m Studio (One Room)
14 Square Meters
14㎡ (150.70 sq ft)
 8.64 Jo 4.24 Tsubo 3.74m × 3.74m Studio (One Room)
15 Square Meters
15㎡ (161.46 sq ft)
 9.26 Jo 4.54 Tsubo 3.87m × 3.87m Studio / 1K
16 Square Meters
16㎡ (172.22 sq ft)
 9.88 Jo 4.84 Tsubo 4.00m × 4.00m Studio / 1K
17 Square Meters
17㎡ (182.99 sq ft)
 10.49 Jo 5.14 Tsubo 4.12m × 4.12m Studio / 1K
18 Square Meters
18㎡ (193.75 sq ft)
 11.11 Jo 5.45 Tsubo 4.24m × 4.24m Studio / 1K
19 Square Meters
19㎡ (204.51 sq ft)
 11.73 Jo 5.75 Tsubo 4.36m × 4.36m Studio / 1K
20 Square Meters
20㎡ (215.28 sq ft)
 12.35 Jo 6.05 Tsubo 4.47m × 4.47m Studio / 1K
21 Square Meters
21㎡ (226.04 sq ft)
 12.96 Jo 6.35 Tsubo 4.58m × 4.58m Studio / 1K
22 Square Meters
22㎡ (236.81 sq ft)
 13.58 Jo 6.66 Tsubo 4.69m × 4.69m Studio / 1K
23 Square Meters
23㎡ (247.57 sq ft)
 14.20 Jo 6.96 Tsubo 4.80m × 4.80m Studio / 1K
24 Square Meters
24㎡ (258.33 sq ft)
 14.81 Jo 7.26 Tsubo 4.90m × 4.90m Studio / 1K
25 Square Meters
25㎡ (269.10 sq ft)
 15.43 Jo 7.56 Tsubo 5.00m × 5.00m Studio / 1K
26 Square Meters
26㎡ (279.86 sq ft)
 16.05 Jo 7.87 Tsubo 5.10m × 5.10m 1K / 1DK
27 Square Meters
27㎡ (290.63 sq ft)
 16.67 Jo 8.17 Tsubo 5.20m × 5.20m 1K / 1DK
28 Square Meters
28㎡ (301.39 sq ft)
 17.28 Jo 8.47 Tsubo 5.29m × 5.29m 1K / 1DK
29 Square Meters
29㎡ (312.15 sq ft)
 17.90 Jo 8.77 Tsubo 5.39m × 5.39m 1K / 1DK / 1LDK
30 Square Meters
30㎡ (322.92 sq ft)
 18.52 Jo 9.08 Tsubo 5.48m × 5.48m 1K / 1DK / 1LDK
31 Square Meters
31㎡ (333.68 sq ft)
 19.14 Jo 9.38 Tsubo 5.57m × 5.57m 1K / 1DK / 1LDK
32 Square Meters
32㎡ (344.45 sq ft)
 19.75 Jo 9.68 Tsubo 5.66m × 5.66m 1K / 1DK / 1LDK
33 Square Meters
33㎡ (355.21 sq ft)
 20.37 Jo 9.98 Tsubo 5.75m × 5.75m 1K / 1DK / 1LDK
34 Square Meters
34㎡ (365.97 sq ft)
 20.99 Jo 10.29 Tsubo 5.83m × 5.83m 1K / 1DK / 1LDK
35 Square Meters
35㎡ (376.74 sq ft)
 21.60 Jo 10.59 Tsubo 5.92m × 5.92m 1K / 1DK / 1LDK / 2K
36 Square Meters
36㎡ (387.50 sq ft)
 22.22 Jo 10.89 Tsubo 6.00m × 6.00m 1K / 1DK / 1LDK / 2K
37 Square Meters
37㎡ (398.26 sq ft)
 22.84 Jo 11.19 Tsubo 6.08m × 6.08m 1K / 1DK / 1LDK / 2K
38 Square Meters
38㎡ (409.03 sq ft)
 23.46 Jo 11.50 Tsubo 6.16m × 6.16m 1K / 1DK / 1LDK / 2K
39 Square Meters
39㎡ (419.79 sq ft)
 24.07 Jo 11.80 Tsubo 6.25m × 6.25m 1K / 1DK / 1LDK / 2K
40 Square Meters
40㎡ (430.56 sq ft)
 24.69 Jo 12.10 Tsubo 6.32m × 6.32m 1K / 1DK / 1LDK / 2K
41 Square Meters
41㎡ (441.32 sq ft)
 25.31 Jo 12.40 Tsubo 6.40m × 6.40m 1DK, 1LDK, 2K
42 Square Meters
42㎡ (452.08 sq ft)
 25.93 Jo 12.71 Tsubo 6.48m × 6.48m 1DK, 1LDK, 2K
43 Square Meters
43㎡ (462.85 sq ft)
 26.54 Jo 13.01 Tsubo 6.56m × 6.56m 1DK, 1LDK, 2K
44 Square Meters
44㎡ (473.61 sq ft)
 27.16 Jo 13.31 Tsubo 6.63m × 6.63m 1DK, 1LDK, 2K
45 Square Meters
45㎡ (484.38 sq ft)
 27.78 Jo 13.61 Tsubo 6.71m × 6.71m 1LDK, 2K, 2DK
46 Square Meters
46㎡ (495.14 sq ft)
 28.40 Jo 13.92 Tsubo 6.78m × 6.78m 1LDK, 2K, 2DK
47 Square Meters
47㎡ (505.90 sq ft)
 29.01 Jo 14.22 Tsubo 6.86m × 6.86m 1LDK, 2K, 2DK
48 Square Meters
48㎡ (516.67 sq ft)
 29.63 Jo 14.52 Tsubo 6.93m × 6.93m 1LDK, 2K, 2DK
49 Square Meters
49㎡ (527.43 sq ft)
 30.25 Jo 14.82 Tsubo 7.00m × 7.00m 1LDK, 2K, 2DK
50 Square Meters
50㎡ (538.20 sq ft)
 30.86 Jo 15.13 Tsubo 7.07m × 7.07m 1LDK, 2K, 2DK
51 Square Meters
51㎡ (548.96 sq ft)
 31.48 Jo 15.43 Tsubo 7.14m × 7.14m 1LDK, 2K, 2DK
52 Square Meters
52㎡ (560.15 sq ft)
 32.10 Jo 15.73 Tsubo 7.21m × 7.21m 1LDK, 2K, 2DK
53 Square Meters
53㎡ (570.49 sq ft)
 32.72 Jo 16.03 Tsubo 7.28m × 7.28m 1LDK, 2K, 2DK
54 Square Meters
54㎡ (581.25 sq ft)
 33.33 Jo 16.34 Tsubo 7.35m × 7.35m 1LDK, 2K, 2DK, 2LDK
55 Square Meters
55㎡ (592.02 sq ft)
 33.95 Jo 16.64 Tsubo 7.42m × 7.42m 1LDK, 2DK, 2LDK
56 Square Meters
56㎡ (602.78 sq ft)
 34.57 Jo 16.94 Tsubo 7.48m × 7.48m 1LDK, 2DK, 2LDK, 3K
57 Square Meters
57㎡ (613.54 sq ft)
 35.19 Jo 17.24 Tsubo 7.55m × 7.55m 1LDK, 2DK, 2LDK, 3K, 3DK
58 Square Meters
58㎡ (624.31 sq ft)
 35.80 Jo 17.55 Tsubo 7.62m × 7.62m 1LDK, 2DK, 2LDK, 3K, 3DK
59 Square Meters
59㎡ (635.07 sq ft)
 36.42 Jo 17.85 Tsubo 7.68m × 7.68m 1LDK, 2DK, 2LDK, 3K, 3DK, 3LDK
60 Square Meters
60㎡ (645.83 sq ft)
 37.04 Jo 18.15 Tsubo 7.75m × 7.75m 1LDK, 2DK, 2LDK, 3K, 3DK, 3LDK
61 Square Meters
61㎡ (656.60 sq ft)
 37.65 Jo 18.45 Tsubo 7.81m × 7.81m 1LDK, 2DK, 2LDK, 3DK, 3LDK
62 Square Meters
62㎡ (667.36 sq ft)
 38.27 Jo 18.76 Tsubo 7.87m × 7.87m 1LDK, 2DK, 2LDK, 3DK, 3LDK
63 Square Meters
63㎡ (678.13 sq ft)
 38.89 Jo 19.06 Tsubo 7.94m × 7.94m 2DK, 2LDK, 3DK, 3LDK
64 Square Meters
64㎡ (688.89 sq ft)
 39.51 Jo 19.36 Tsubo 8.00m × 8.00m 2DK, 2LDK, 3DK, 3LDK
65 Square Meters
65㎡ (699.65 sq ft)
 40.12 Jo 19.66 Tsubo 8.06m × 8.06m 2DK, 2LDK, 3DK, 3LDK
66 Square Meters
66㎡ (710.42 sq ft)
 40.74 Jo 19.97 Tsubo 8.12m × 8.12m 2LDK, 3DK, 3LDK
67 Square Meters
67㎡ (721.18 sq ft)
 41.36 Jo 20.27 Tsubo 8.19m × 8.19m 2LDK, 3DK, 3LDK
68 Square Meters
68㎡ (731.95 sq ft)
 41.98 Jo 20.57 Tsubo 8.25m × 8.25m 2LDK, 3DK, 3LDK
69 Square Meters
69㎡ (742.71 sq ft)
 42.59 Jo 20.87 Tsubo 8.31m × 8.31m 2LDK, 3DK, 3LDK
70 Square Meters
70㎡ (753.47 sq ft)
 43.21 Jo 21.18 Tsubo 8.37m × 8.37m 2LDK, 3DK, 3LDK
71 Square Meters
71㎡ (764.24 sq ft)
 43.83 Jo 21.48 Tsubo 8.43m × 8.43m 2LDK, 3DK, 3LDK
72 Square Meters
72㎡ (775.00 sq ft)
 44.44 Jo 21.78 Tsubo 8.49m × 8.49m 2LDK, 3DK, 3LDK
73 Square Meters
73㎡ (785.77 sq ft)
 45.06 Jo 22.08 Tsubo 8.54m × 8.54m 2LDK, 3DK, 3LDK, 4DK
74 Square Meters
74㎡ (796.53 sq ft)
 45.68 Jo 22.39 Tsubo 8.60m × 8.60m 2LDK, 3DK, 3LDK, 4DK
75 Square Meters
75㎡ (807.29 sq ft)
 46.30 Jo 22.69 Tsubo 8.66m × 8.66m 2LDK, 3DK, 3LDK, 4DK
76 Square Meters
76㎡ (818.06 sq ft)
 46.91 Jo 22.99 Tsubo 8.72m × 8.72m 2LDK, 3DK, 3LDK, 4DK, 4LDK
77 Square Meters
77㎡ (828.82 sq ft)
 47.53 Jo 23.29 Tsubo 8.78m × 8.78m 2LDK, 3DK, 3LDK, 4DK, 4LDK
78 Square Meters
78㎡ (839.59 sq ft)
 48.15 Jo 23.60 Tsubo 8.83m × 8.83m 2LDK, 3DK, 3LDK, 4DK, 4LDK
79 Square Meters
79㎡ (850.35 sq ft)
 48.77 Jo 23.90 Tsubo 8.89m × 8.89m 2LDK, 3DK, 3LDK, 4DK, 4LDK
80 Square Meters
80㎡ (861.11 sq ft)
 49.38 Jo 24.20 Tsubo 8.94m × 8.94m 2LDK, 3DK, 3LDK, 4DK, 4LDK
81 Square Meters
81㎡ (871.88 sq ft)
 50.00 Jo 24.50 Tsubo 9.00m × 9.00m 2LDK, 3DK, 3LDK, 4DK, 4LDK
82 Square Meters
82㎡ (882.64 sq ft)
 50.62 Jo 24.81 Tsubo 9.06m × 9.06m 2LDK, 3DK, 3LDK, 4DK, 4LDK
83 Square Meters
83㎡ (893.40 sq ft)
 51.23 Jo 25.11 Tsubo 9.11m × 9.11m 2LDK, 3DK, 3LDK, 4DK, 4LDK
84 Square Meters
84㎡ (904.17 sq ft)
 51.85 Jo 25.41 Tsubo 9.17m × 9.17m 2LDK, 3DK, 3LDK, 4DK, 4LDK
85 Square Meters
85㎡ (914.93 sq ft)
 52.47 Jo 25.71 Tsubo 9.22m × 9.22m 2LDK, 3DK, 3LDK, 4DK, 4LDK
86 Square Meters
86㎡ (925.70 sq ft)
 53.09 Jo 26.02 Tsubo 9.27m × 9.27m 3DK, 3LDK, 4LDK
87 Square Meters
87㎡ (936.46 sq ft)
 53.70 Jo 26.32 Tsubo 9.33m × 9.33m 3DK, 3LDK, 4LDK
88 Square Meters
88㎡ (947.22 sq ft)
 54.32 Jo 26.62 Tsubo 9.38m × 9.38m 3DK, 3LDK, 4LDK
89 Square Meters
89㎡ (957.99 sq ft)
 54.94 Jo 26.92 Tsubo 9.43m × 9.43m 3DK, 3LDK, 4LDK
90 Square Meters
90㎡ (968.75 sq ft)
 55.56 Jo 27.23 Tsubo 9.49m × 9.49m 3DK, 3LDK, 4LDK
91 Square Meters
91㎡ (979.52 sq ft)
 56.17 Jo 27.53 Tsubo 9.54m × 9.54m 3DK, 3LDK, 4LDK, 5DK
92 Square Meters
92㎡ (990.28 sq ft)
 56.79 Jo 27.83 Tsubo 9.59m × 9.59m 3DK, 3LDK, 4LDK, 5DK
93 Square Meters
93㎡ (1001.04 sq ft)
 57.41 Jo 28.13 Tsubo 9.64m × 9.64m 3DK, 3LDK, 4LDK, 5DK
94 Square Meters
94㎡ (1011.81 sq ft)
 58.02 Jo 28.44 Tsubo 9.70m × 9.70m 3DK, 3LDK, 4LDK, 5DK
95 Square Meters
95㎡ (1022.57 sq ft)
 58.64 Jo 28.74 Tsubo 9.75m × 9.75m 3DK, 3LDK, 4LDK, 5DK
96 Square Meters
96㎡ (1033.34 sq ft)
 59.26 Jo 29.04 Tsubo 9.80m × 9.80m 3DK, 3LDK, 4LDK, 5DK
97 Square Meters
97㎡ (1044.10 sq ft)
 59.88 Jo 29.34 Tsubo 9.85m × 9.85m 3DK, 3LDK, 4LDK, 5DK
98 Square Meters
98㎡ (1054.86 sq ft)
 60.49 Jo 29.65 Tsubo 9.90m × 9.90m 3DK, 3LDK, 4LDK, 5DK
99 Square Meters
99㎡ (1065.63 sq ft)
 61.11 Jo 29.95 Tsubo 9.95m × 9.95m 3DK, 3LDK, 4LDK, 5DK
100 Square Meters
100㎡ (1076.39 sq ft)
 61.73 Jo 30.25 Tsubo 10.00m × 10.00m 3DK, 3LDK, 4LDK, 5DK

Note: Since “Jo” and “Tsubo” values are rounded, they represent “approximate” figures.

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