Convert Square Chain to Square Perch
Convert square chains to square perches instantly. 1 square chain = 15.9999999984 square perch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Perch 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 Perch
A square perch is identical to a square rod, equal to approximately 25.293 m². 'Perch' is the older English regional name for the same unit.
Identical in value to square rod and square pole; differs only in regional naming preference. 'Perch' is more commonly used in British and Irish historical contexts.
Square perches survive in some historical British property records, particularly in Ireland where the unit had legal status until the metric transition.
Standardized via the 1959 International Yard and Pound Agreement.
Square Chain to Square Perch conversion formula
The relationship between square chains and square perches:
To convert square chains to square perches, multiply the value in square chains by 15.9999999984. To reverse, multiply square perches by 0.0625.
How to use this converter
Type a value into the calculator. The result in square perches 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 Perch to Square Chain converter for the reverse direction.
Step-by-step: convert square chains to square perches
- Write down the value in square chains (ch²).
- Multiply that value by the factor 15.9999999984.
- The product is the equivalent value in square perches (perch²).
- To reverse, multiply the square perch value by 0.0625.
Worked examples
Example 1 — Convert 1 ch² to perch²:
1 × 15.9999999984 = 15.9999999984 perch²
Example 2 — Convert 100 ch² to perch²:
100 × 15.9999999984 = 1599.9999998419 perch²
Square Chain to Square Perch conversion table
Standard reference values for converting square chains to square perches:
| Square Chain [ch²] | Square Perch [perch²] |
|---|---|
| 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 perches is 1 square chain?
How do I convert square chains to square perches?
How do I convert square perches back to square chains?
How many square perches is 100 square chains?
Popular area unit conversions
Convert Square Chain to other area units
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 ch² = 15.9999999984 perch²) 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.