Convert Square Perch to Square Chain
Convert square perches to square chains instantly. 1 square perch = 0.0625 square chain — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Chain to Square Perch converter for the reverse conversion.
Units explained
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
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 to Square Chain conversion formula
The relationship between square perches and square chains:
To convert square perches to square chains, multiply the value in square perches by 0.0625. To reverse, multiply square chains by 15.9999999984.
How to use this converter
Type a value into the calculator. The result in square chains 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 Chain to Square Perch converter for the reverse direction.
Step-by-step: convert square perches to square chains
- Write down the value in square perches (perch²).
- Multiply that value by the factor 0.0625.
- The product is the equivalent value in square chains (ch²).
- To reverse, multiply the square chain value by 15.9999999984.
Worked examples
Example 1 — Convert 1 perch² to ch²:
1 × 0.0625 = 0.0625 ch²
Example 2 — Convert 100 perch² to ch²:
100 × 0.0625 = 6.2500000006 ch²
Square Perch to Square Chain conversion table
Standard reference values for converting square perches to square chains:
| Square Perch [perch²] | Square Chain [ch²] |
|---|---|
| 0.01 | 0.000625 |
| 0.1 | 0.00625 |
| 1 | 0.0625 |
| 2 | 0.125 |
| 3 | 0.1875 |
| 4 | 0.25 |
| 5 | 0.3125 |
| 10 | 0.6250000001 |
| 20 | 1.2500000001 |
| 30 | 1.8750000002 |
| 40 | 2.5000000002 |
| 50 | 3.1250000003 |
| 100 | 6.2500000006 |
| 500 | 31.2500000031 |
| 1000 | 62.5000000062 |
Frequently asked questions
How many square chains is 1 square perch?
How do I convert square perches to square chains?
How do I convert square chains back to square perches?
How many square chains is 100 square perches?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 perch² = 0.0625 ch²) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.