How many square meters is one pyeong?

One pyeong is 400/121 m², about 3.3058 m². One square meter is 0.3025 pyeong.

Area Converter - Square Meters, Square Feet, Acres, Pyeong

1 pyeong / tsubo in other units

1 m² ≈ 10.764 ft² and 1 ft² ≈ 0.0929 m². Listings in the US, Canada and India use square feet.
1 acre ≈ 4,046.86 m² ≈ 0.4047 ha, and 1 hectare ≈ 2.471 acres.
1 pyeong = 400/121 m² ≈ 3.3058 m². Koreans still describe homes in pyeong, and the Japanese tsubo is the same size.
Tatami mats (jō) describe room sizes in Japan. Mat sizes vary by region, and this converter uses the 1.62 m² minimum set for Japanese property listings.
1 mu (亩) ≈ 666.67 m², the Chinese farmland unit, with 15 mu to a hectare.