Convert Square Meters to Pyeong (m² to 평)

This direction is for someone holding an official square-meter figure — from a property deed, a presale (분양) notice, a floor plan, or an English-language listing site — who wants the intuitive pyeong number Korean speakers actually use in conversation. 59 m² converts to about 17.85 pyeong, and 84 m² converts to about 25.41 pyeong.

Those two figures are not arbitrary: 59 m² and 84 m² are the exclusive areas behind Korea’s most common apartment sizes, colloquially called the "24평형" and "34평형" (or "national pyeong size") respectively. The "평형" label refers to the older supply-area convention rather than the exclusive m² figure itself, which is why 84 m² is often described as "34평형" even though 84 m² alone converts to about 25.4 pyeong — the extra roughly 8.6 pyeong is the unit’s share of the building’s shared space, not a mistake in either number.

Japan sizes rooms with a different but related convention: 帖 (jō) or 畳 (tatami mats), where a standard room is described as "6帖" or "8畳". One tsubo is conventionally treated as two tatami mats, so a room’s tatami count roughly halves to its tsubo footprint, and multiplying that by 400⁄121 gives square meters — though the physical size of one mat varies by regional standard (Kyoto-ma, Edo-ma, and others), so this is a working approximation rather than an exact figure.

Korea’s Measures Act has required square meters on deeds, contracts, and advertisements since a 2007 revision, which is why every official number you will actually encounter — on a registry printout, a presale brochure, or a bank’s loan paperwork — arrives in square meters and needs converting back into pyeong to be intuitive.