Convert Square Perch to Square Furlong
Convert square perches to square furlongs instantly. 1 square perch = 0.000625 square furlong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Furlong 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 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 Perch to Square Furlong conversion formula
The relationship between square perches and square furlongs:
To convert square perches to square furlongs, multiply the value in square perches by 0.000625. To reverse, multiply square furlongs by 1600.
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 Perch converter for the reverse direction.
Step-by-step: convert square perches to square furlongs
- Write down the value in square perches (perch²).
- Multiply that value by the factor 0.000625.
- The product is the equivalent value in square furlongs (fur²).
- To reverse, multiply the square furlong value by 1600.
Worked examples
Example 1 — Convert 1 perch² to fur²:
1 × 0.000625 = 0.000625 fur²
Example 2 — Convert 100 perch² to fur²:
100 × 0.000625 = 0.0625 fur²
Square Perch to Square Furlong conversion table
Standard reference values for converting square perches to square furlongs:
| Square Perch [perch²] | Square Furlong [fur²] |
|---|---|
| 0.01 | 6.25e-6 |
| 0.1 | 6.25e-5 |
| 1 | 0.000625 |
| 2 | 0.00125 |
| 3 | 0.001875 |
| 4 | 0.0025 |
| 5 | 0.003125 |
| 10 | 0.00625 |
| 20 | 0.0125 |
| 30 | 0.01875 |
| 40 | 0.025 |
| 50 | 0.03125 |
| 100 | 0.0625 |
| 500 | 0.3125 |
| 1000 | 0.625 |
Frequently asked questions
How many square furlongs is 1 square perch?
How do I convert square perches to square furlongs?
How do I convert square furlongs back to square perches?
How many square furlongs 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 = 0.000625 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.