Convert pole to femtometer Online | Free Length Converter

Pole

A pole is another traditional unit of length equivalent to a rod or perch. It measures exactly 16.5 feet, 5.5 yards, or about 5.0292 meters.

The pole has been used historically in land measurement and surveying, especially in England and the United States. Like the rod and perch, it helped standardize measurements of fields, plots, and boundaries before the adoption of metric units.

Key conversions:

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  1 pole = 16.5 feet

  
  
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  1 pole = 5.5 yards

  
  
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  1 pole ≈ 5.0292 meters

  
  
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  4 poles = 1 chain

  
  
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  40 poles = 1 furlong

  
  

Though largely replaced by modern units, the pole remains a notable term in historical surveying and land records.

Femtometer

A femtometer (fm) is a unit of length in the metric system, equal to one-quadrillionth of a meter (1 fm = 10⁻¹⁵ meters). It is also known as a fermi, named after the physicist Enrico Fermi. Femtometers are used to measure extremely small distances at the subatomic level, such as the size of protons, neutrons, and atomic nuclei. For example, the radius of a proton is about 0.84 femtometers. This unit is commonly used in nuclear physics and particle physics, but it's far too small for everyday measurements.