Ping (unit)

Pyeong
Listing outside a Korean real-estate agency showing floorspace in square meters and pyeong
Chinese name
Chinese
Transcriptions Standard Mandarin Hanyu Pinyin píng Wade–Giles p'ing Southern Min Hokkien POJ pêⁿ pîⁿ phêⁿ phîⁿ phiâⁿ phêng
Korean name
Hangul
Hanja
Transcriptions Revised Romanization pyeong McCune–Reischauer p'yŏng
Japanese name
Kanji
Kana
Transcriptions Romanization tsubo

A pyeong (abbreviation py) is a Korean unit of area and floorspace, equal to a square kan or 36 square Korean feet. The ping and tsubo are its equivalent Chinese and Japanese units, similarly based on a square bu () or ken, equivalent to 36 square Chinese or Japanese feet.

In mainland China, the metrification of traditional units would produce a ping of 4 m², but it is almost unknown with most real estate floorspace simply reckoned in square meters. The longer length of the Hong Kong foot produces a larger ping of almost 5 m², but it is similarly uncommon. On Taiwan, the ping remains in fairly common use but owing to its long occupation it has been standardized to the Japanese foot rather than the Chinese.

In Japan, the usual measure of real estate floorspace is the tatami and the tsubo is reckoned as two tatami. The tatami varies by region but the modern standard is usually taken to be the Nagoya tatami of about 1.653 m², producing a tsubo of 3.306 m². It is sometimes reckoned as comprising 10 gō.