Pyeong ⇄ Square Metre
Converts between 평 and square metres and shows the common apartment sizes each value corresponds to.
평 is not a legal unit — contracts and registers are in square metres — but it is what everyone says, and the conversion is awkward enough that 84㎡ being “34평” surprises people. This converts either way and names the apartment size a figure corresponds to.
Result
84 ㎡
25.41 평
Rounded
25.4 평
The form used in property listings
1평 is 400/121 ㎡. As a decimal that is 3.3057851239669… and never terminates, so a table using 3.3058 drifts on a large area. This keeps the fraction, which is why 84㎡ comes out at exactly 25.41평.
Common sizes
| 전용면적 (exclusive) | 평 | Known as | Notes |
|---|---|---|---|
| 39 ㎡ | 11.80 | 17평형 | Studio or a small officetel |
| 49 ㎡ | 14.82 | 20평형 | Small, for a newly married couple |
| 59 ㎡ | 17.85 | 24평형 | Small 국민주택 (public-standard housing), three rooms |
| 74 ㎡ | 22.39 | 30평형 | Three rooms |
| 84 ㎡ | 25.41 | 34평형 | The ceiling of 국민주택 규모 (public-housing size) — the commonest size there is |
| 101 ㎡ | 30.55 | 40평형 | Upper-middle |
| 114 ㎡ | 34.49 | 45평형 | Upper-middle |
| 134 ㎡ | 40.54 | 52평형 | Large |
By 전용면적 (exclusive area). The 평형 name in an advertisement is derived from 공급면적 (supply area) instead.
How to use it
Type either unit
One 평 is 400/121 square metres, about 3.3058 — the reciprocal is what makes mental arithmetic unreliable.
Check which area you are converting
전용면적 is what you live in; 공급면적 adds the shared corridors and stairs; 계약면적 adds the parking and communal facilities. A listing usually quotes one and a register the other.
Read the 평형 label as a name
“34평” for an 84㎡ 전용면적 is a market label derived from the 공급면적, not a conversion of the exclusive area. That is why the arithmetic does not appear to work.
Common questions
Why is 84㎡ called 34평 when 84 ÷ 3.3 is 25?
Because the label comes from the 공급면적, which is roughly 112㎡ for an 84㎡ exclusive area, and 112 ÷ 3.3058 is about 34. The two numbers describe different areas.
Can I write 평 in a contract?
Square metres are the statutory unit for official documents, and a register records them. Writing 평 alongside is common in practice; writing only 평 in a document that matters is not a good idea.
Is 85㎡ significant?
It is the 국민주택규모 threshold, and it appears in tax and housing rules — 농어촌특별세 on acquisition is not charged below it, for one. That is why listings cluster at 84㎡.
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