Korean Apartment Size Calculator: Pyeong, m² & ft²

Enter one area value and convert it directly between pyeong (평), square meters (m²), and square feet (ft²).

Calculator

Conversion basis

• 1 m² = 0.3025 pyeong
• 1 pyeong ≈ 3.3058 m²
• 1 m² ≈ 10.7639 ft²
• 1 pyeong ≈ 35.58 ft²

Each result should be calculated from the fixed conversion constants rather than from another rounded result.

Why does 84 m² equal 25.41 pyeong, but people say “33 or 34 pyeong”?

Because the two numbers may refer to different area bases.

By direct conversion:

84 m² × 0.3025 = 25.41 pyeong

But in Korean apartment sales and planning materials, a familiar “33-pyeong” or “34-pyeong” label can be based on the larger supply area (공급면적) rather than the apartment’s exclusive area (전용면적).

Official Seoul project records show that apartments with roughly the same 84 m² exclusive area can have different supply areas. In one project, an 84.97 m² exclusive-area unit had a 111.52 m² supply area, or about 33.73 pyeong, while another 84.93 m² unit had a 113.43 m² supply area, or about 34.31 pyeong.

So these two statements can both be correct:

• 84 m² = 25.41 pyeong by direct unit conversion
• An apartment with about 84 m² of exclusive area may be marketed or described as a 33–34 pyeong type when the label uses supply area

Do not treat “84 m² = 34 pyeong” as an automatic conversion rule.

Exclusive area and supply area are not the same thing

When reading a Korean apartment listing, the label attached to the number matters.

Exclusive area (전용면적)

Exclusive area is the area used only by the household for residential purposes.

This is the key m² figure used in many official housing records and apartment unit-type labels.

Residential common area (주거공용면적)

This is shared residential space such as:

• stairs
• corridors
• entrances

Supply area (공급면적)

In ordinary apartment sales or planning materials, supply area typically means:

exclusive area + residential common area

That is why the supply-area number is larger than the exclusive-area number.

The exact difference is not fixed. Two apartments with similar exclusive areas can have different residential common areas and therefore different supply areas.

Do not estimate supply area from exclusive area

If a listing gives only an exclusive area, do not apply a fixed percentage to guess the supply area.

There is no safe nationwide exclusive-to-supply-area ratio.

For the same reason, this calculator does not automatically map:

• 59 m²
• 74 m²
• 84 m²
• 101 m²
• 114 m²

to fixed market “pyeong-type” labels.

If the exact supply area matters, check the specific apartment’s official unit plan, recruitment notice, or another source that states it directly.

Common Korean apartment-size references

These are direct unit conversions only. They are not automatic market pyeong-type labels.

These sizes appear in real Korean apartment and public-housing materials, but they are examples—not a legally fixed national set of apartment sizes.

Advanced mode: compare exclusive area and supply area separately

If you already know both numbers, enter them separately.

Do not use one number to estimate the other.

This lets you compare, for example:

• 84 m² exclusive area → 25.41 pyeong
• a separately stated 113 m² supply area → about 34.18 pyeong

without pretending that every 84 m² apartment has a 113 m² supply area.

Why official Korean records use m²

Korean official housing records use square meters as the legal measurement basis.

Pyeong is still common in everyday housing conversation, so it remains useful for interpretation and comparison.

It is too broad to say that pyeong is simply “illegal to use.” Current measurement law restricts non-statutory units in official measurement and advertising contexts but allows them to be shown alongside legal units when prescribed conditions are met.

For practical use:

Treat m² as the official anchor and pyeong as a conversation and interpretation aid.

If the numbers still do not match

If a listing says 84 m² but someone calls the apartment 34 pyeong, do not assume one of them is wrong.

First check whether:

• 84 m² is the exclusive area
• 34 pyeong refers to the supply area

If the listing does not identify the area basis, look for the field name or the official unit plan.

If the supply area is missing, do not reconstruct it from an assumed ratio.

For actual transaction records and area fields, the MOLIT Real Transaction Price Disclosure System is a useful official next step. For the exact supply-area configuration of a specific complex or unit type, an official recruitment notice, unit plan, or complex document may be more direct.