Convert Rod to Ell
Convert rods to ells instantly. 1 rod = 4.4 ell — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ell 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.
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 to Ell conversion formula
The relationship between rods and ells:
To convert rods to ells, multiply the value in rods by 4.4. To reverse, multiply ells by 0.2272727273.
How to use this converter
Type a value into the calculator. The result in ells updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ell to Rod converter for the reverse direction.
Step-by-step: convert rods to ells
- Write down the value in rods (rd).
- Multiply that value by the factor 4.4.
- The product is the equivalent value in ells (ell).
- To reverse, multiply the ell value by 0.2272727273.
Worked examples
Example 1 — Convert 1 rd to ell:
1 × 4.4 = 4.4 ell
Example 2 — Convert 100 rd to ell:
100 × 4.4 = 440 ell
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 rd × 4.4 = 4.4 ell
Real-world example — Adult height conversion
A 1.8-rod-tall person measures a value in ells that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.
1.8 rd × 4.4 = 7.92 ell
Real-world example — Fabric purchase length
Two rods of fabric equals a value in ells essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 rd × 4.4 = 8.8 ell
Rod to Ell conversion table
Standard reference values for converting rods to ells:
| Rod [rd] | Ell [ell] |
|---|---|
| 0.01 | 0.044 |
| 0.1 | 0.44 |
| 1 | 4.4 |
| 2 | 8.8 |
| 3 | 13.2 |
| 4 | 17.6 |
| 5 | 22 |
| 10 | 44 |
| 20 | 88 |
| 30 | 132 |
| 40 | 176 |
| 50 | 220 |
| 100 | 440 |
| 500 | 2200 |
| 1000 | 4400 |
Frequently asked questions
How many ells is 1 rod?
How do I convert rods to ells?
How do I convert ells back to rods?
How many ells is 100 rods?
Popular length unit conversions
Convert Rod to other length units
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 rd = 4.4 ell) 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.