Convert Ell to Rod
Convert ells to rods instantly. 1 ell = 0.2272727273 rod — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Rod to Ell converter for the reverse conversion.
Units explained
Ell
An ell is an Imperial unit of length equal to 45 inches (1.143 m), historically used as the standard measure of cloth in English commerce.
The ell derives from old English elna (forearm) and was standardised in medieval English trade as the cloth-measuring yard equivalent. The English ell is 45 inches; other regional ells differed.
Ells appear in historical English commerce records (especially cloth and tapestry trade). Used in legal documents through the 19th century; rare in modern commerce but referenced in literary and historical contexts.
Medieval English cloth-trade origin; standardised at 45 inches; became exact via the 1959 International Yard and Pound Agreement.
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.
Ell to Rod conversion formula
The relationship between ells and rods:
To convert ells to rods, multiply the value in ells by 0.2272727273. To reverse, multiply rods by 4.4.
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 Ell converter for the reverse direction.
Step-by-step: convert ells to rods
- Write down the value in ells (ell).
- Multiply that value by the factor 0.2272727273.
- The product is the equivalent value in rods (rd).
- To reverse, multiply the rod value by 4.4.
Worked examples
Example 1 — Convert 1 ell to rd:
1 × 0.2272727273 = 0.2272727273 rd
Example 2 — Convert 100 ell to rd:
100 × 0.2272727273 = 22.7272727273 rd
Real-world example — Fabric purchase length
Two ells of fabric equals a value in rods essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 ell × 0.2272727273 = 0.4545454545 rd
Real-world example — Maritime depth conversion
A 10-ell sounding depth converts cleanly into rods. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 ell × 0.2272727273 = 2.2727272727 rd
Real-world example — Reference scenario in case of fallback
Conversion between human-scale length units is the everyday workflow of architecture, athletics, and apparel design — three of the most common contexts that span metric and imperial systems.
1 ell × 0.2272727273 = 0.2272727273 rd
Ell to Rod conversion table
Standard reference values for converting ells to rods:
| Ell [ell] | Rod [rd] |
|---|---|
| 0.01 | 0.0022727273 |
| 0.1 | 0.0227272727 |
| 1 | 0.2272727273 |
| 2 | 0.4545454545 |
| 3 | 0.6818181818 |
| 4 | 0.9090909091 |
| 5 | 1.1363636364 |
| 10 | 2.2727272727 |
| 20 | 4.5454545455 |
| 30 | 6.8181818182 |
| 40 | 9.0909090909 |
| 50 | 11.3636363636 |
| 100 | 22.7272727273 |
| 500 | 113.6363636364 |
| 1000 | 227.2727272727 |
Frequently asked questions
How many rods is 1 ell?
How do I convert ells to rods?
How do I convert rods back to ells?
How many rods is 100 ells?
Popular length unit conversions
Convert Ell to other length units
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 ell = 0.2272727273 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.