Convert furlong (US survey) to perch Online | Free Length Converter

Furlong (US Survey)

The furlong (US survey) is a traditional unit of distance used in U.S. land surveying, defined as 1/8 of a U.S. survey mile, or exactly 660 U.S. survey feet. Since one U.S. survey foot equals approximately 0.3048006096 meters, the US survey furlong is about 201.1684 meters long.

While the difference between the US survey furlong and the international (standard) furlong is extremely small (just a few micrometers), it was significant in precise land measurements, particularly in legal and cadastral surveying contexts.

Key Conversions:

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  1 US survey furlong = 660 US survey feet

  
  
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  1 US survey furlong ≈ 220 yards

  
  
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  1 US survey furlong ≈ 201.1684 meters

  
  
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  8 US survey furlongs = 1 US survey mile

  
  

As of 2023, the U.S. has officially deprecated the use of the survey foot (and by extension the survey furlong) in favor of the international foot, but it may still appear in historical and legal documents.

Perch

A perch is an old unit of length that is synonymous with the rod or pole, commonly used in land measurement and surveying. It measures 16.5 feet, 5.5 yards, or approximately 5.0292 meters.

The perch was widely used in England and later in the United States for measuring plots of land, especially before the widespread adoption of the metric system. It was also used to describe area when squared (square perch).

Key points:

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  1 perch = 16.5 feet

  
  
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  1 perch = 5.5 yards

  
  
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  1 perch ≈ 5.0292 meters

  
  
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  4 perches = 1 chain

  
  
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  40 perches = 1 furlong

  
  

While largely obsolete today, the term perch still appears in historical land deeds, legal documents, and some traditional surveying contexts.