Convert Square Chain to Square Furlong
Convert square chains to square furlongs instantly. 1 square chain = 0.01 square furlong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Furlong 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 Furlong
A square furlong is an imperial unit of area equal to exactly 40,468.564 m², or 10 acres.
Derived by squaring the furlong (660 feet or 1/8 mile). The furlong itself comes from medieval English 'furrow long', the length of a plowed furrow.
Square furlongs are rarely used today. The unit appears occasionally in historical English farming records and in some horseracing contexts (though usually as length, not area).
Medieval English origin; standardized via the 1959 International Yard and Pound Agreement.
Square Chain to Square Furlong conversion formula
The relationship between square chains and square furlongs:
To convert square chains to square furlongs, multiply the value in square chains by 0.01. To reverse, multiply square furlongs by 100.0000000099.
How to use this converter
Type a value into the calculator. The result in square furlongs 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 Furlong to Square Chain converter for the reverse direction.
Step-by-step: convert square chains to square furlongs
- Write down the value in square chains (ch²).
- Multiply that value by the factor 0.01.
- The product is the equivalent value in square furlongs (fur²).
- To reverse, multiply the square furlong value by 100.0000000099.
Worked examples
Example 1 — Convert 1 ch² to fur²:
1 × 0.01 = 0.01 fur²
Example 2 — Convert 100 ch² to fur²:
100 × 0.01 = 0.9999999999 fur²
Square Chain to Square Furlong conversion table
Standard reference values for converting square chains to square furlongs:
| Square Chain [ch²] | Square Furlong [fur²] |
|---|---|
| 0.01 | 1e-4 |
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 30 | 0.3 |
| 40 | 0.4 |
| 50 | 0.5 |
| 100 | 0.9999999999 |
| 500 | 4.9999999995 |
| 1000 | 9.999999999 |
Frequently asked questions
How many square furlongs is 1 square chain?
How do I convert square chains to square furlongs?
How do I convert square furlongs back to square chains?
How many square furlongs is 100 square chains?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 ch² = 0.01 fur²) 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.