Convert Square Rod to Square Mile
Convert square rods to square miles instantly. 1 square rod = 9.765625e-6 square mile — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Mile to Square Rod converter for the reverse conversion.
Units explained
Square Rod
A square rod is an imperial unit of area equal to approximately 25.293 m². It is part of the historical English land survey system.
Derived by squaring the rod (16.5 feet or 1/4 chain). The rod, perch, and pole are three names for the same length.
Square rods appear in historical English and American land surveys and legacy property records. The unit is largely obsolete today, surviving mainly in legal descriptions of older land grants.
Standardized via the 1959 International Yard and Pound Agreement.
Square Mile
A square mile is an imperial unit of area equal to exactly 2,589,988.110336 m². It is used for measuring large land areas in the United States and the United Kingdom.
Derived by squaring the statute mile (5,280 feet). The mile was standardized via the 1959 International Yard and Pound Agreement.
Square miles are used for US and UK regional geography (county areas, lake sizes, large parks), national statistics, and military range descriptions. 1 mi² = 640 acres = 2.589988 km².
Mile dates to Roman antiquity; modern exact value standardized in 1959.
Square Rod to Square Mile conversion formula
The relationship between square rods and square miles:
To convert square rods to square miles, multiply the value in square rods by 9.765625e-6. To reverse, multiply square miles by 102400.
How to use this converter
Type a value into the calculator. The result in square miles 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 Mile to Square Rod converter for the reverse direction.
Step-by-step: convert square rods to square miles
- Write down the value in square rods (rd²).
- Multiply that value by the factor 9.765625e-6.
- The product is the equivalent value in square miles (mi²).
- To reverse, multiply the square mile value by 102400.
Worked examples
Example 1 — Convert 1 rd² to mi²:
1 × 9.765625e-6 = 9.765625e-6 mi²
Example 2 — Convert 100 rd² to mi²:
100 × 9.765625e-6 = 0.0009765625 mi²
Square Rod to Square Mile conversion table
Standard reference values for converting square rods to square miles:
| Square Rod [rd²] | Square Mile [mi²] |
|---|---|
| 0.01 | 9.765625e-8 |
| 0.1 | 9.765625e-7 |
| 1 | 9.765625e-6 |
| 2 | 1.953125e-5 |
| 3 | 2.929687e-5 |
| 4 | 3.90625e-5 |
| 5 | 4.882813e-5 |
| 10 | 9.765625e-5 |
| 20 | 0.0001953125 |
| 30 | 0.0002929687 |
| 40 | 0.000390625 |
| 50 | 0.0004882812 |
| 100 | 0.0009765625 |
| 500 | 0.0048828125 |
| 1000 | 0.009765625 |
Frequently asked questions
How many square miles is 1 square rod?
How do I convert square rods to square miles?
How do I convert square miles back to square rods?
How many square miles is 100 square rods?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 rd² = 9.765625e-6 mi²) 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.