Korea Apartment Area & Price-per-Pyeong

A listing's '84㎡' is the supply area — your actual living space (exclusive area) is smaller. Enter both to see pyeong, exclusive ratio, and price per pyeong at a glance.

Area & Price-per-Pyeong

Enter supply and exclusive area, then calculate.

What this tool does

A Korean property listing's headline area — say '84㎡' — is the supply area, which includes shared space like stairs and hallways. Your actual living space is the smaller exclusive area. This tool converts both to pyeong, shows the exclusive ratio, and computes price per pyeong on both bases. It decodes the exclusive-vs-supply trap that causes foreign renters and buyers to overestimate how much space they actually get.

Who uses this

Renters and buyers checking how much living space a listing really offers
Comparing apartments with different exclusive ratios at the same supply area
Calculating the true price per pyeong (exclusive basis) before negotiating
Understanding why an 84㎡ apartment 'reads' as 25 pyeong but lives like 18
Converting between ㎡ and pyeong for any Korean property document

How to use (4 steps)

1Enter the supply area in ㎡ — the figure in the listing (e.g. 84).
2Enter the exclusive area in ㎡ — found on the deed or floor plan (e.g. 59).
3Optionally enter the sale or jeonse price to get price per pyeong.
4Click Calculate to see pyeong conversions, the exclusive ratio, and per-pyeong prices on both supply and exclusive bases.

Formula

1 pyeong = 3.3058㎡ (1㎡ = 0.3025 pyeong) Supply pyeong = supply ㎡ × 0.3025 Exclusive pyeong = exclusive ㎡ × 0.3025 Exclusive ratio = exclusive ÷ supply Price per pyeong (supply) = price ÷ supply pyeong Price per pyeong (exclusive) = price ÷ exclusive pyeong

Real examples

National size — 84㎡ supply / 59㎡ exclusive

Supply 25.4 pyeong, exclusive 17.8 pyeong, exclusive ratio 70%. This 84/59 combo is Korea's most common apartment size, the 'national size' (국민평형).

Price per pyeong — ₩1B for the 84㎡

Supply basis ≈ ₩39.4M/pyeong; exclusive basis ≈ ₩56.0M/pyeong. Agents quote the lower supply figure, but you actually live in the exclusive area.

Officetel — 50㎡ supply / 28㎡ exclusive

Exclusive ratio just 56%. Officetels have far lower ratios than apartments, so the same supply area gives much less living space.

Apartment viewing & contract inspection checklist

Area terms — don't get fooled by price-per-pyeong

Distinguish 전용면적 (exclusive area — your actual living space) from 공급면적 (supply area — exclusive + shared hallways, stairs, lobby).
Korean listings usually advertise the larger 공급면적, so the unit feels smaller than the headline number — always ask which figure is quoted.
For officetels, watch for 계약면적 (contract area), which adds parking and facility areas on top, inflating the size further.
Compute price-per-pyeong (평당가) on a consistent area basis — comparing one unit's 전용 to another's 공급 is misleading.
Cross-check the stated area against the free 건축물대장 (building register) from gov.kr (1 pyeong ≈ 3.3㎡).

Documents to verify before paying anything

Pull a fresh 등기부등본 (property register) yourself from IROS (iros.go.kr, ~₩1,000) — don't trust the landlord's copy.
Confirm the registered owner matches the landlord's ID and the contract; review the 을구 section for mortgages/liens (근저당권).
Get the free 건축물대장 from gov.kr to confirm legal use and catch any illegal extension (위반건축물).
Check 실거래가 (reported transaction prices) on rt.molit.go.kr to judge whether the price or deposit is fair.
Red flags: an unusually cheap price, a 'friend/agent' signing instead of the owner, or a deposit sent to a third-party account.

Physical inspection during the viewing

Check the orientation (방향) — 남향 (south-facing) gets the most sunlight; confirm which way the main windows face.
Inspect for 결로 (condensation) and 곰팡이 (mold) on window frames, low walls, behind furniture, and in the bathroom.
Test 수압 (water pressure) on taps and the shower, especially in older or high-rise buildings.
Check the floor, daylight (채광) at the time you'd actually be home, heating (보일러) in every room, and the hallway/elevator.
Document existing defects (하자) with photos and have them noted in the contract before move-in.

Costs, move-in & practical confirmations

Get a written breakdown of 관리비 (maintenance fee, ~₩70,000–250,000/month) and what it includes versus separate utilities.
Confirm parking (주차), the move-in date (입주 가능일), and a written list of built-in/option items (빌트인/옵션 — fridge, washer, A/C).
Photograph the gas and electricity meter readings at handover so you aren't charged for the previous occupant's usage.
Bring a Korean speaker or a translation app (Papago) — listings and contracts are usually Korean-only.

Frequently asked questions

What's the difference between supply and exclusive area?

Supply area = exclusive area + shared residential space (stairs, hallways, elevators). Exclusive area is the usable space inside your unit. Listings usually show supply area.

What is a good exclusive ratio?

Apartments are typically 70–80%; officetels 50–60%. A higher ratio means more of the advertised area is actually yours to live in.

Why is 84㎡ called 25 pyeong?

84㎡ × 0.3025 = 25.4 pyeong (supply). The exclusive area of about 59㎡ ≈ 17.8 pyeong is what you live in. The 84/59 pairing is Korea's 'national size'.

Which price per pyeong should I use?

Agents quote the supply basis, which looks cheaper. For honest value comparison, the exclusive basis is better because it reflects the space you actually use.

Is there a contract area too?

Yes — contract area adds other shared space (underground parking, management offices). It is the largest figure and used mainly for officetels and commercial units.

Does this match the deed?

The deed (등기부등본) lists the exact exclusive area. Always verify against the deed and contract, not just the listing.

Cautions

•Listings usually show supply area; the exclusive area on the deed is smaller — confirm both.
•Officetels and some mixed-use buildings have much lower exclusive ratios than apartments.
•Price per pyeong on a supply basis looks lower; the exclusive basis reflects true usable cost.
•1 pyeong = 3.3058㎡ exactly; rounded figures in ads can differ slightly.
•Reference only — verify actual areas on the deed and contract.