Convert Square Foot to Pyeong
Convert square feet to pyeongs instantly. 1 square foot = 0.0281030431 pyeong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pyeong to Square Foot converter for the reverse conversion.
Units explained
Square Foot
A square foot is an imperial unit of area equal to exactly 0.09290304 m². It is the dominant unit for real estate area measurement in the United States and is widely used in India for residential property listings.
Derived by squaring the foot. The foot was standardized to exactly 0.3048 m via the 1959 International Yard and Pound Agreement.
Square feet are the standard unit for US real estate floor area, HVAC capacity ratings (BTU per ft²), commercial leasing, and construction. In India, square feet is the dominant unit for residential property advertisements alongside traditional regional units.
Foot dates to ancient civilizations; modern exact value standardized in 1959.
Pyeong
A pyeong is a Korean unit of area equal to approximately 3.3058 m² (about 35.58 square feet).
Originated as a traditional East Asian land unit. Korean usage standardizes pyeong at 400/121 m² ≈ 3.3058 m². Defined as the area of a 6-by-6 Korean foot (cheok) square.
Pyeong is the primary unit for residential real estate in South Korea. Although the government tried to phase pyeong out in favor of square meters from 2007, the unit remains in widespread popular use, particularly for apartment sizes.
Traditional East Asian unit; remains in widespread Korean use despite government metric campaigns.
Square Foot to Pyeong conversion formula
The relationship between square feet and pyeongs:
To convert square feet to pyeongs, multiply the value in square feet by 0.0281030431. To reverse, multiply pyeongs by 35.5833350556.
How to use this converter
Type a value into the calculator. The result in pyeongs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pyeong to Square Foot converter for the reverse direction.
Step-by-step: convert square feet to pyeongs
- Write down the value in square feet (ft²).
- Multiply that value by the factor 0.0281030431.
- The product is the equivalent value in pyeongs (pyeong).
- To reverse, multiply the pyeong value by 35.5833350556.
Worked examples
Example 1 — Convert 1 ft² to pyeong:
1 × 0.0281030431 = 0.0281030431 pyeong
Example 2 — Convert 100 ft² to pyeong:
100 × 0.0281030431 = 2.8103043136 pyeong
Real-world example — Furniture and large objects
A 72-square foot piece of furniture converts to a value in pyeongs that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 ft² × 0.0281030431 = 2.0234191058 pyeong
Real-world example — Children's height milestones
A 150-square foot-tall child measures a value in pyeongs that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 ft² × 0.0281030431 = 4.2154564704 pyeong
Real-world example — Body height conversion
You enter your height as 180 square feet into an international job or visa application. The form then asks for the same value in pyeongs — converting between these adjacent units is one of the most-used length conversions globally.
180 ft² × 0.0281030431 = 5.0585477645 pyeong
Square Foot to Pyeong conversion table
Standard reference values for converting square feet to pyeongs:
| Square Foot [ft²] | Pyeong [pyeong] |
|---|---|
| 0.01 | 0.0002810304 |
| 0.1 | 0.0028103043 |
| 1 | 0.0281030431 |
| 2 | 0.0562060863 |
| 3 | 0.0843091294 |
| 4 | 0.1124121725 |
| 5 | 0.1405152157 |
| 10 | 0.2810304314 |
| 20 | 0.5620608627 |
| 30 | 0.8430912941 |
| 40 | 1.1241217255 |
| 50 | 1.4051521568 |
| 100 | 2.8103043136 |
| 500 | 14.0515215682 |
| 1000 | 28.1030431363 |
Frequently asked questions
How many pyeongs is 1 square foot?
How do I convert square feet to pyeongs?
How do I convert pyeongs back to square feet?
How many pyeongs is 100 square feet?
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Metric / SI (16 units)
Imperial / US Customary (14 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ft² = 0.0281030431 pyeong) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.