Convert Centiinch to Rod
Convert centiinches to rods instantly. 1 centiinch = 5.050505e-5 rod — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Rod to Centiinch converter for the reverse conversion.
Units explained
Centiinch
A centiinch is an Imperial unit of length equal to one hundredth of an inch (2.54×10⁻⁴ m). It is functionally identical to the caliber as a length unit but appears in different industrial contexts.
Derived from the inch via the metric-style prefix centi- (Latin centum, hundred). Standardised through the 1959 International Yard and Pound Agreement.
Centiinches occasionally appear in older engineering specifications and US-localised metric-pseudo notation. Most contemporary use prefers thousandths (mils) for sub-inch precision.
Standardised through the 1959 International Yard and Pound Agreement; rarely used in modern practice.
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.
Centiinch to Rod conversion formula
The relationship between centiinches and rods:
To convert centiinches to rods, multiply the value in centiinches by 5.050505e-5. To reverse, multiply rods by 19800.
How to use this converter
Type a value into the calculator. The result in rods updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Rod to Centiinch converter for the reverse direction.
Step-by-step: convert centiinches to rods
- Write down the value in centiinches (cin).
- Multiply that value by the factor 5.050505e-5.
- The product is the equivalent value in rods (rd).
- To reverse, multiply the rod value by 19800.
Worked examples
Example 1 — Convert 1 cin to rd:
1 × 5.050505e-5 = 5.050505e-5 rd
Example 2 — Convert 100 cin to rd:
100 × 5.050505e-5 = 0.0050505051 rd
Real-world example — Macro-scale buildup
A million centiinches equals exactly one rod — the conversion that bridges microscale features and macroscale objects in microfluidic, biomedical, and semiconductor packaging design.
1000000 cin × 5.050505e-5 = 50.5050505051 rd
Real-world example — Quarter-meter measurement reference
A 250,000-centiinch length equals 0.25 rods — useful for comparing supply-chain spec sheets where some lengths are quoted in the smaller unit and some in the larger.
250000 cin × 5.050505e-5 = 12.6262626263 rd
Real-world example — From microscopic to macroscopic
A million centiinches equals exactly one rod. This kind of conversion appears in microfluidics, where total channel length is given in rods but feature widths are in centiinches.
1000000 cin × 5.050505e-5 = 50.5050505051 rd
Centiinch to Rod conversion table
Standard reference values for converting centiinches to rods:
| Centiinch [cin] | Rod [rd] |
|---|---|
| 0.01 | 5.050505e-7 |
| 0.1 | 5.050505e-6 |
| 1 | 5.050505e-5 |
| 2 | 0.0001010101 |
| 3 | 0.0001515152 |
| 4 | 0.0002020202 |
| 5 | 0.0002525253 |
| 10 | 0.0005050505 |
| 20 | 0.001010101 |
| 30 | 0.0015151515 |
| 40 | 0.002020202 |
| 50 | 0.0025252525 |
| 100 | 0.0050505051 |
| 500 | 0.0252525253 |
| 1000 | 0.0505050505 |
Frequently asked questions
How many rods is 1 centiinch?
How do I convert centiinches to rods?
How do I convert rods back to centiinches?
How many rods is 100 centiinches?
Popular length unit conversions
Convert Centiinch to other length units
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 cin = 5.050505e-5 rd) 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.