Convert Rod to Mile
Convert rods to miles instantly. 1 rod = 0.003125 mile — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Mile to Rod converter for the reverse conversion.
Units explained
Rod
A rod is an Imperial unit of length equal to 16.5 feet (about 5.03 m). It is also called a perch or pole. Used historically in English and American land surveying.
The rod derives from medieval English land-surveying practice. Standardised at 16.5 feet (= 25 links of a surveyor's chain = 1/4 chain) by Edmund Gunter in 1620.
Rods are the standard unit in legacy US public-land-survey records, where lot dimensions are typically expressed in rods and chains. Modern surveyors generally use feet or meters but legacy deeds remain in rods.
Defined by Edmund Gunter in 1620 as 16.5 feet via the chain-based survey system; became exact via the 1959 International Yard and Pound Agreement.
Mile
A mile (statute mile) is an Imperial and US customary unit of length equal to 5,280 feet or exactly 1,609.344 meters. It is the standard unit for road distances in the United States and the United Kingdom.
The mile derives from the Roman mille passus ("thousand paces" — about 1,480 meters). The English statute mile was fixed at 5,280 feet by the Weights and Measures Act of 1593, and exactly defined as 1,609.344 m by the 1959 International Yard and Pound Agreement.
Miles are used in the US and UK for road signs, speed limits (mph), athletic events (one-mile run), and geographic distances. Aviation also uses statute miles for some visibility measurements.
Roman origin (mille passus); English statute mile fixed at 5,280 feet in 1593; standardized to 1,609.344 m exactly by the 1959 International Yard and Pound Agreement.
Rod to Mile conversion formula
The relationship between rods and miles:
To convert rods to miles, multiply the value in rods by 0.003125. To reverse, multiply miles by 320.
How to use this converter
Type a value into the calculator. The result in 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 Mile to Rod converter for the reverse direction.
Step-by-step: convert rods to miles
- Write down the value in rods (rd).
- Multiply that value by the factor 0.003125.
- The product is the equivalent value in miles (mi).
- To reverse, multiply the mile value by 320.
Worked examples
Example 1 — Convert 1 rd to mi:
1 × 0.003125 = 0.003125 mi
Example 2 — Convert 100 rd to mi:
100 × 0.003125 = 0.3125 mi
Real-world example — Imperial mile arithmetic
5,280 rods equals exactly one mile. American hikers tracking elevation gain in the smaller unit but trail length in the larger one use this constant every time they read a topographic map.
5280 rd × 0.003125 = 16.5 mi
Real-world example — Imperial yard-to-mile scale
1,760 rods equals exactly one mile. American athletes and surveyors use this conversion to translate distances quoted in the smaller imperial unit into recognizable fractions of the larger geographic one.
1760 rd × 0.003125 = 5.5 mi
Real-world example — Metric distance scale-up
One thousand rods equals one mile — the running distance for a 1K race or the standard metric kilometre-scale step. The simple thousand-fold conversion is the most-used metric distance translation.
1000 rd × 0.003125 = 3.125 mi
Rod to Mile conversion table
Standard reference values for converting rods to miles:
| Rod [rd] | Mile [mi] |
|---|---|
| 0.01 | 3.125e-5 |
| 0.1 | 0.0003125 |
| 1 | 0.003125 |
| 2 | 0.00625 |
| 3 | 0.009375 |
| 4 | 0.0125 |
| 5 | 0.015625 |
| 10 | 0.03125 |
| 20 | 0.0625 |
| 30 | 0.09375 |
| 40 | 0.125 |
| 50 | 0.15625 |
| 100 | 0.3125 |
| 500 | 1.5625 |
| 1000 | 3.125 |
Frequently asked questions
How many miles is 1 rod?
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Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 rd = 0.003125 mi) 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.