Convert Pyeong to Tan
Convert pyeongs to tan instantly. 1 pyeong = 0.0033333468 tan — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tan to Pyeong converter for the reverse conversion.
Units explained
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.
Tan
A tan is a Japanese unit of area equal to approximately 991.74 m². It equals 300 tsubo, or 1/10 chō.
Traditional Japanese agricultural unit. The tan was the standard rice paddy size in pre-modern Japan.
Tan appears in Japanese rural property records and historical land descriptions. Used alongside chō and tsubo in Japanese agricultural documentation.
Traditional Japanese unit; standardized via the tsubo definition.
Pyeong to Tan conversion formula
The relationship between pyeongs and tan:
To convert pyeongs to tan, multiply the value in pyeongs by 0.0033333468. To reverse, multiply tan by 299.9987900054.
How to use this converter
Type a value into the calculator. The result in tan updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Tan to Pyeong converter for the reverse direction.
Step-by-step: convert pyeongs to tan
- Write down the value in pyeongs (pyeong).
- Multiply that value by the factor 0.0033333468.
- The product is the equivalent value in tan (tan).
- To reverse, multiply the tan value by 299.9987900054.
Worked examples
Example 1 — Convert 1 pyeong to tan:
1 × 0.0033333468 = 0.0033333468 tan
Example 2 — Convert 100 pyeong to tan:
100 × 0.0033333468 = 0.3333346778 tan
Real-world example — Fabric purchase length
Two pyeongs of fabric equals a value in tan essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 pyeong × 0.0033333468 = 0.0066666936 tan
Real-world example — Maritime depth conversion
A 10-pyeong sounding depth converts cleanly into tan. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 pyeong × 0.0033333468 = 0.0333334678 tan
Real-world example — Reference scenario in case of fallback
Conversion between human-scale length units is the everyday workflow of architecture, athletics, and apparel design — three of the most common contexts that span metric and imperial systems.
1 pyeong × 0.0033333468 = 0.0033333468 tan
Pyeong to Tan conversion table
Standard reference values for converting pyeongs to tan:
| Pyeong [pyeong] | Tan [tan] |
|---|---|
| 0.01 | 3.333347e-5 |
| 0.1 | 0.0003333347 |
| 1 | 0.0033333468 |
| 2 | 0.0066666936 |
| 3 | 0.0100000403 |
| 4 | 0.0133333871 |
| 5 | 0.0166667339 |
| 10 | 0.0333334678 |
| 20 | 0.0666669356 |
| 30 | 0.1000004033 |
| 40 | 0.1333338711 |
| 50 | 0.1666673389 |
| 100 | 0.3333346778 |
| 500 | 1.6666733889 |
| 1000 | 3.3333467778 |
Frequently asked questions
How many tan is 1 pyeong?
How do I convert pyeongs to tan?
How do I convert tan back to pyeongs?
How many tan is 100 pyeongs?
Popular area unit conversions
Convert Pyeong to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 pyeong = 0.0033333468 tan) 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.