Convert Pole to Span
Convert poles to spans instantly. 1 pole = 22 span — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Span to Pole converter for the reverse conversion.
Units explained
Pole
A pole is an Imperial unit of length identical to the rod and perch — 16.5 feet (about 5.03 m). The names are regional and historical variants for the same measurement.
The pole derives from medieval English land-surveying. The name comes from the physical wooden pole used by surveyors to lay out the unit on the ground.
Poles appear in historical land records, particularly older US public-land surveys. Functionally identical to rod and perch in all calculations.
Medieval English surveying origin; identical to the rod since 1620; became exact via the 1959 International Yard and Pound Agreement.
Span
A span is an Imperial unit of length equal to 9 inches (228.6 mm). Historically, it represented the distance from the tip of an extended thumb to the tip of an extended little finger.
The span derives from this natural body-measurement and was standardised at 9 inches in English customary practice.
Spans are rare in modern commerce but appear in historical English literature, biblical translation studies, and reproduction crafts. Some construction and gardening still use 'span' informally.
Ancient body-measure origin; standardised in English customary practice at 9 inches; became exact via the 1959 International Yard and Pound Agreement.
Pole to Span conversion formula
The relationship between poles and spans:
To convert poles to spans, multiply the value in poles by 22. To reverse, multiply spans by 0.0454545455.
How to use this converter
Type a value into the calculator. The result in spans updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Span to Pole converter for the reverse direction.
Step-by-step: convert poles to spans
- Write down the value in poles (pole).
- Multiply that value by the factor 22.
- The product is the equivalent value in spans (span).
- To reverse, multiply the span value by 0.0454545455.
Worked examples
Example 1 — Convert 1 pole to span:
1 × 22 = 22 span
Example 2 — Convert 100 pole to span:
100 × 22 = 2200 span
Real-world example — Fabric purchase length
Two poles of fabric equals a value in spans essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 pole × 22 = 44 span
Real-world example — Maritime depth conversion
A 10-pole sounding depth converts cleanly into spans. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 pole × 22 = 220 span
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 pole × 22 = 22 span
Pole to Span conversion table
Standard reference values for converting poles to spans:
| Pole [pole] | Span [span] |
|---|---|
| 0.01 | 0.22 |
| 0.1 | 2.2 |
| 1 | 22 |
| 2 | 44 |
| 3 | 66 |
| 4 | 88 |
| 5 | 110 |
| 10 | 220 |
| 20 | 440 |
| 30 | 660 |
| 40 | 880 |
| 50 | 1100 |
| 100 | 2200 |
| 500 | 11000 |
| 1000 | 22000 |
Frequently asked questions
How many spans is 1 pole?
How do I convert poles to spans?
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How many spans is 100 poles?
Popular length unit conversions
Convert Pole to other length units
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 pole = 22 span) 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.