Convert Square Chain to Square Pole
Convert square chains to square poles instantly. 1 square chain = 15.9999999984 square pole — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Pole to Square Chain converter for the reverse conversion.
Units explained
Square Chain
A square chain is an imperial unit of area equal to approximately 404.686 m². It equals 1/10 of an acre.
Derived by squaring the chain (66 feet or 22 yards). The chain was defined by Edmund Gunter in 1620 specifically so that 10 square chains equal exactly one acre.
Square chains appear in US Public Land Survey System (PLSS) records and historical English property documents. The 10-to-1 ratio with acres made early survey arithmetic easier.
Defined by Edmund Gunter in 1620 specifically for surveying convenience.
Square Pole
A square pole is identical to a square rod, equal to approximately 25.293 m². 'Pole' is a regional name used in some US and British contexts.
Identical to square rod and square perch; differs only in regional naming preference.
Square poles appear in some historical US land records, particularly in mid-Atlantic states with strong English colonial heritage.
Standardized via the 1959 International Yard and Pound Agreement.
Square Chain to Square Pole conversion formula
The relationship between square chains and square poles:
To convert square chains to square poles, multiply the value in square chains by 15.9999999984. To reverse, multiply square poles by 0.0625.
How to use this converter
Type a value into the calculator. The result in square poles updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Pole to Square Chain converter for the reverse direction.
Step-by-step: convert square chains to square poles
- Write down the value in square chains (ch²).
- Multiply that value by the factor 15.9999999984.
- The product is the equivalent value in square poles (pole²).
- To reverse, multiply the square pole value by 0.0625.
Worked examples
Example 1 — Convert 1 ch² to pole²:
1 × 15.9999999984 = 15.9999999984 pole²
Example 2 — Convert 100 ch² to pole²:
100 × 15.9999999984 = 1599.9999998419 pole²
Square Chain to Square Pole conversion table
Standard reference values for converting square chains to square poles:
| Square Chain [ch²] | Square Pole [pole²] |
|---|---|
| 0.01 | 0.16 |
| 0.1 | 1.5999999998 |
| 1 | 15.9999999984 |
| 2 | 31.9999999968 |
| 3 | 47.9999999953 |
| 4 | 63.9999999937 |
| 5 | 79.9999999921 |
| 10 | 159.9999999842 |
| 20 | 319.9999999684 |
| 30 | 479.9999999526 |
| 40 | 639.9999999367 |
| 50 | 799.9999999209 |
| 100 | 1599.9999998419 |
| 500 | 7999.9999992093 |
| 1000 | 15999.9999984185 |
Frequently asked questions
How many square poles is 1 square chain?
How do I convert square chains to square poles?
How do I convert square poles back to square chains?
How many square poles is 100 square chains?
Popular area unit conversions
Convert Square Chain to other area units
Show all Square Chain conversions
Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 ch² = 15.9999999984 pole²) 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.