Square meters to pyeong: Korean area converter
Convert square meters to pyeong, a Korean area unit. 84 m² is 25.41 pyeong; this model estimates 34 pyeong for a Korean apartment or 52 for an officetel when common areas are included. Convert either way, measure a rectangular room and check the difference between private and supply area. The model uses 1 pyeong ≈ 3.305785 m².
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Area converter: m², pyeong and Korean housing estimates
How to convert square meters and pyeong
This free area converter works both ways between square meters (m²) and pyeong, an area unit used in Korean property. It also estimates a housing size that includes an assumed share of common areas for a Korean apartment or officetel, a Korean mixed-use building type. Whether you are reading a Korean listing, comparing a purchase or rental, or checking an interior quote, first establish which area the original number describes. The private-area conversion and the housing estimate are different results; a label such as “34 pyeong” does not mean the private interior is 34 pyeong.
Private area and the advertised Korean housing size can differ. In this model, 84 m² of private area converts to 25.41 pyeong; applying the apartment assumption gives about 34 pyeong including common areas, while the officetel assumption gives about 52. Choose the building type to compare the same input under these assumptions. These factors describe this calculator, not a guaranteed ratio for Korean buildings or a housing rule for another country. All calculations run in your current browser and the tool does not save your entries.
When this tool is needed
- Convert the m² in a Korean listing to pyeong, or check how many m² correspond to an area quoted in pyeong.
- Compare the estimated Korean apartment and officetel housing sizes for 59 m² or 84 m² of private area.
- Find the area of a rectangular room or shop from measured width and length.
- Check the m² behind a pyeong-based renovation or moving quote before comparing prices.
Check before calculating
- Check whether the listing gives private area or an area including common spaces. They produce different housing-size numbers.
- Housing estimates use assumed private-area shares of about 75% for apartments and 49% for officetels. Actual labels depend on the building and property.
- Check the official plan and property notice for how balconies and other service areas are listed.
- Width × length assumes a rectangle. Split an L-shaped room into rectangles, calculate each one and add the areas.
How to use
- Enter the known area in either the square-metre or pyeong field. The other field updates automatically.
- If you only have tape-measure lengths, open “Measure width × length” and enter both sides in m or cm. The tool fills m² and pyeong.
- The default building type is a Korean apartment. Choose officetel when appropriate, or area conversion only for a room or land when no housing estimate is needed.
- For an apartment or officetel, read the estimated pyeong including assumed common areas below the building selector.
- Use the four presets (apartment 59/84 m² and officetel 25/84 m²) to compare common example areas quickly.
- Choose Copy result to copy the summary, for example “84 m² = 25.41 pyeong · Korean apartment: estimated supply area 34 pyeong”. Use the length (cm/in) and weight (kg/lb) tabs for those conversions.
Pyeong conversion formulas and mental estimates
Use pyeong = m² ÷ 3.305785, or m² = pyeong × 3.305785. For a mental estimate, multiply m² by 0.3 and add a little, or use about 0.3025. The calculator retains its original rounded conversion constant, 3.305785. For example, 84 × 0.3 is 25.2, while the displayed conversion is 25.41 pyeong. You can use the page without installing an app, and calculation inputs stay in the browser.
- m² → pyeong: 59 m² = 17.85 · 74 m² = 22.39 · 84 m² = 25.41 · 101 m² = 30.55 · 114 m² = 34.49
- pyeong → m²: 10 = 33.06 m² · 20 = 66.12 m² · 25 = 82.64 m² · 30 = 99.17 m² · 40 = 132.23 m²
Measure a room or shop by width × length
- Measure width and length in meters. If measured in centimeters, divide each length by 100 or choose cm in the calculator.
- Width × length = m². A 3 m × 4 m room has an area of 12 m².
- m² ÷ 3.305785 = pyeong. 12 m² = 3.63 pyeong.
- Studio room: 3 m × 4 m → 12 m² = 3.63 pyeong
- Bedroom: 3.5 m × 4.5 m → 15.75 m² = 4.76 pyeong
- Shop: 5 m × 6 m → 30 m² = 9.08 pyeong
Enter both sides in “Measure width × length” to fill m² and pyeong automatically. Choose area conversion only to omit the housing-size estimate.
Private-area conversion and Korean housing estimates
This table uses the same formulas as the calculator: pyeong = m² ÷ 3.305785, and estimated supply pyeong = m² × the selected factor ÷ 3.305785, rounded to an integer. The 25 m² and 33 m² rows illustrate officetel/studio examples, so their apartment cells are left blank.
Apartment and officetel model assumptions
The private-area ratio compares private interior area with the chosen total area. This calculator fixes the apartment multiplier at 1.33 (about 75% private area) and the officetel multiplier at 2.05 (about 49%). For 84 m² of private area, those assumptions give about 34 and 52 pyeong respectively; they do not describe every building or guarantee an error range. As a comparison, an assumed private-area ratio of 80% gives about 32 pyeong, while 70% gives about 36. Use the actual area categories and ratio in the official property notice when comparing a particular building.
Korean property area terms
In Korean housing documents, private area refers to the interior used by the resident, such as rooms, living space and kitchen. Supply area adds residential common areas such as stairs, corridors and lifts; this is often the basis behind a quoted housing size in pyeong. Balconies and other service areas may be listed separately, so check the official plan. Establish which area a contract or advertisement gives before comparing its number with the converted result.
Conversion precision and limits of the estimate
Divide m² by 3.305785 to obtain pyeong, or multiply pyeong by 3.305785 to obtain m². Housing estimates apply fixed factors of 1.33 for an apartment or 2.05 for an officetel. Differences in buildings and area definitions can produce larger discrepancies, so the estimate does not replace official property or registration data. The reference table uses the same factors as the calculator. Prediction uses the original m² input, or the original pyeong input multiplied by 3.305785, rather than the rounded two-decimal display.
Input ranges and displayed precision
Conversion inputs must be greater than 0 and at most 100,000,000. Each rectangle side may be at most 10,000 m; cm inputs are checked after conversion to meters. Converted fields show two decimal places and the summary shows up to six decimal places for the original input. The rectangle area is rounded to four decimal places before transfer to the m² field, so a very small positive area can round to zero and require input correction. Native number fields keep their built-in steppers; Spanish comma entry is normalized to the number field’s decimal-point value, while the summary and copied text use Spanish number formatting.
Sources and review criteria
Pyeong is an area unit used in Korea. This tool retains its original rounded constant of 3.305785 m² per pyeong. Its apartment factor of 1.33 and officetel factor of 2.05 are simple model assumptions, not international standards. Length and mass use 1 in = 2.54 cm and 1 lb = 0.45359237 kg. See NIST length units and NIST conversion factors. Calculations do not request external data. Reviewed on 2026-10-31.
Housing estimates and the comparison table are reference values based on assumed private-area ratios. Actual size labels, official property and registration areas, and common-area shares vary by building, product and location. Check official documents before entering a contract.
FAQ
How do I convert square meters to pyeong?
Divide square meters (m²) by 3.305785 to obtain pyeong. For a mental estimate, multiply m² by about 0.3025 (roughly 0.3). For example, 84 m² is 25.41 pyeong and 59 m² is 17.85. To convert back, multiply pyeong by 3.305785: 30 pyeong is 99.17 m². Enter a number in either field and the other updates automatically.
How can I find room area from width and length?
Multiply the two floor-plan sides in meters to obtain m², then divide by 3.305785. A 3 m × 4 m room is 12 m² or 3.63 pyeong; 3.5 m × 4.5 m is 15.75 m² or 4.76 pyeong. For centimeters, divide each side by 100 before multiplying: 350 cm × 450 cm corresponds to 3.5 m × 4.5 m. Open Measure width × length and enter both sides to calculate m², pyeong and, when selected, the housing estimate.
How many square meters are in one pyeong?
One pyeong is approximately 3.305785 m²; this calculator uses the rounded constant 3.305785. One m² is about 0.3025 pyeong. Examples: 10 pyeong = 33.06 m², 20 = 66.12 m², 30 = 99.17 m² and 34 = 112.40 m². Pyeong is a customary unit used in Korean property, so also check the source area in m² when comparing properties.
Why can an 84 m² Korean apartment be called 34 pyeong?
Private area of 84 m² converts to 25.41 pyeong. The commonly quoted “34 pyeong” instead refers to an area including residential common spaces. Under this model’s apartment assumption, 84 × 1.33 ÷ 3.3058 is about 34 pyeong. Its officetel assumption uses 2.05 (about 49% private area) and estimates about 52 pyeong for the same 84 m². 59 m² converts to 17.85 pyeong and an apartment estimate of about 24. Actual area composition and ratios vary; no error bound is guaranteed. Verify the official property documents.
What do private, supply and contract area mean in Korean property?
Private area is the interior used by the resident, including rooms, living room, kitchen and bathroom. Supply area adds residential common areas such as stairs, corridors and lifts, and often underlies a housing size quoted in pyeong. Contract area also includes other common areas such as parking or management facilities. Balconies and service areas may be listed separately: check the official plan and property notice. Identify the advertised area category before converting it.