Convert Inch to Rod
Convert inches to rods instantly. 1 inch = 0.0050505051 rod — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Rod to Inch converter for the reverse conversion.
Units explained
Inch
An inch is an Imperial and US customary unit of length defined since 1959 as exactly 25.4 millimeters (0.0254 meters). It is still the standard small unit of length in the United States, the United Kingdom (informally), and a few other countries.
The inch derives from the Roman uncia (one-twelfth of a foot) and survived through Anglo-Saxon and medieval English measurement systems. Various definitions persisted regionally until the 1959 International Yard and Pound Agreement standardized the inch globally as exactly 25.4 mm.
Inches are used in the US and UK for body height, screen sizes (TVs, monitors, phones), tire sizes, plumbing, lumber, paper sizes (US Letter is 8.5 × 11 in), and most consumer product specifications in the United States.
Anglo-Saxon origin (predating 1066); standardized to 25.4 mm exactly by the International Yard and Pound Agreement of 1959, signed by the US, UK, Canada, Australia, New Zealand, and South Africa.
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.
Inch to Rod conversion formula
The relationship between inches and rods:
To convert inches to rods, multiply the value in inches by 0.0050505051. To reverse, multiply rods by 198.
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 Inch converter for the reverse direction.
Step-by-step: convert inches to rods
- Write down the value in inches (in).
- Multiply that value by the factor 0.0050505051.
- The product is the equivalent value in rods (rd).
- To reverse, multiply the rod value by 198.
Worked examples
Example 1 — Convert 1 in to rd:
1 × 0.0050505051 = 0.0050505051 rd
Example 2 — Convert 100 in to rd:
100 × 0.0050505051 = 0.5050505051 rd
Real-world example — Body height conversion
You enter your height as 180 inches into an international job or visa application. The form then asks for the same value in rods — converting between these adjacent units is one of the most-used length conversions globally.
180 in × 0.0050505051 = 0.9090909091 rd
Real-world example — Furniture and large objects
A 72-inch piece of furniture converts to a value in rods that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 in × 0.0050505051 = 0.3636363636 rd
Real-world example — Children's height milestones
A 150-inch-tall child measures a value in rods that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 in × 0.0050505051 = 0.7575757576 rd
Inch to Rod conversion table
Standard reference values for converting inches to rods:
| Inch [in] | Rod [rd] |
|---|---|
| 0.01 | 5.050505e-5 |
| 0.1 | 0.0005050505 |
| 1 | 0.0050505051 |
| 2 | 0.0101010101 |
| 3 | 0.0151515152 |
| 4 | 0.0202020202 |
| 5 | 0.0252525253 |
| 10 | 0.0505050505 |
| 20 | 0.101010101 |
| 30 | 0.1515151515 |
| 40 | 0.202020202 |
| 50 | 0.2525252525 |
| 100 | 0.5050505051 |
| 500 | 2.5252525253 |
| 1000 | 5.0505050505 |
Frequently asked questions
How many rods is 1 inch?
How do I convert inches to rods?
How do I convert rods back to inches?
How many rods is 100 inches?
Popular length unit conversions
Convert Inch to other length units
Show all Inch conversions
Metric / SI (18 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 in = 0.0050505051 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.