Convert chain (US survey) to pole Online | Free Length Converter

Chain (US Survey)

The US survey chain is a unit of length used historically in land surveying in the United States. It is defined as exactly 66 US survey feet, which is slightly longer than the international foot. Since one US survey foot equals about 0.3048006096 meters, the US survey chain is approximately 20.11684 meters long.

Like the standard chain, it is divided into 100 links, each measuring 0.66 US survey feet. The US survey chain was widely used in the Public Land Survey System to measure land parcels and boundaries.

Key facts:

• 
  

  1 US survey chain = 66 US survey feet

  
  
• 
  

  1 US survey chain ≈ 20.11684 meters

  
  
• 
  

  10 US survey chains = 1 furlong

  
  
• 
  

  80 US survey chains = 1 US survey mile

  
  

Though the US survey foot and chain are being phased out in favor of international units, the US survey chain still appears in historical land records and some legal contexts.

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:

• 
  

  1 pole = 16.5 feet

  
  
• 
  

  1 pole = 5.5 yards

  
  
• 
  

  1 pole ≈ 5.0292 meters

  
  
• 
  

  4 poles = 1 chain

  
  
• 
  

  40 poles = 1 furlong

  
  

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