Pyeong Converter

Converts between pyeong — the traditional Korean unit of floor area — and square metres, in both directions. One pyeong is 3.3058 square metres, the area of two tatami-sized floor panels. Korean property listings, rental ads and interior quotes still quote area in pyeong everywhere, so anyone reading a Seoul apartment listing from abroad ends up needing exactly this conversion.

How to use

1. Enter a value in either field — pyeong or square metres.
2. The other field updates as you type; no button needed.
3. For square feet, multiply the square-metre figure by 10.764.
4. Keep in mind which area a listing means — supply area and exclusive-use area differ (see below).

When you actually need this

• Reading a Korean apartment listing — "24평" — and wanting it in square metres (about 79 m²).
• Comparing a Seoul officetel against apartments elsewhere quoted in square metres or square feet.
• Making sense of a Korean interior or moving quote priced per pyeong.
• Converting the legal square-metre figure on a contract back to the pyeong size everyone quotes in conversation.

Why the number on the contract looks smaller

One pyeong equals exactly 400/121 ≈ 3.3058 m², a definition inherited from the Japanese tsubo. Korea officially switched legal documents to square metres in 2007, but everyday usage never followed, so listings mix both. The common trap is which area is being quoted: the pyeong figure in an ad is usually the supply area (공급면적), which includes shares of corridors and stairwells, while the contract states the smaller exclusive-use area (전용면적). A "24평" apartment often has only about 59 m² of exclusive space rather than the 79 m² the conversion suggests. For a quick mental figure, one pyeong is roughly two tatami mats or a bit over 35 square feet.

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FAQ

How precise are the conversion factors in Pyeong Converter?

The factors are the internationally defined exact values — one inch is exactly 25.4 millimetres, one pound is exactly 0.45359237 kilograms, and so on. Results are computed at full floating-point precision and only rounded for display.

Can I convert between metric and imperial units in both directions?

Yes. Enter a value in any field and every other unit updates at once, so the conversion works in either direction without switching modes or pressing a button.

Why does the last decimal place sometimes look off?

Because many conversions are irrational in decimal form and browsers use binary floating point, the final digit can differ by a tiny amount. The displayed value is rounded sensibly for everyday use; for laboratory or engineering work, carry the unrounded figure through your own calculation.