Square meter to pyeong / tsubo converter

Square meters, pyeong (Korea) and tsubo (Japan), tatami mats, square feet and more, all at once. One pyeong or tsubo is exactly 400/121 m² (about 3.3058 m²).

AreaUnit

—Square meters (m²)

—Pyeong / tsubo (평·坪)

—Tatami mats (畳, 1.62 m²)

—Square feet (ft²)

—Ares (a)

—Hectares (ha)

—Acres (ac)

Pyeong / tsubo to m² table

Pyeong / tsubo (평·坪)	Square meters (m²)	Tatami mats (畳, 1.62 m²)	Square feet (ft²)
10	33.06	20.41	355.83
15	49.59	30.61	533.75
18	59.5	36.73	640.5
20	66.12	40.81	711.66
24	79.34	48.97	854
25	82.64	51.02	889.58
30	99.17	61.22	1,067.5
32	105.79	65.3	1,138.66
34	112.4	69.38	1,209.83
40	132.23	81.62	1,423.33
45	148.76	91.83	1,601.24
50	165.29	102.03	1,779.16
60	198.35	122.44	2,134.99

How to use

Enter an area and choose its unit.
Every other unit updates at once.
The table lists common pyeong sizes in m², tatami and square feet.

Questions

How big is one pyeong or tsubo?

A square of 6 shaku per side, with 1 shaku = 10/33 m, so 400/121 m² ≈ 3.305785 m² (about 35.58 ft²).

Is a Korean "34-pyeong" apartment 34 pyeong of floor space?

Usually not. Listing sizes are often the supply area, which includes shared residential space; a "34-pyeong" flat typically has about 84 m² (25.4 pyeong) of exclusive floor area.

Are pyeong and tsubo the same?

Yes, the same unit of 400/121 m².

Why is a tatami mat 1.62 m² here?

That is the minimum per mat set by Japan's real-estate advertising rules. Real mats vary by region, roughly 1.45–1.82 m².

Is anything sent anywhere?

No. The conversion runs inside your browser.

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