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

Mile (Roman)

The Roman mile (mille passuum, meaning "a thousand paces") was a unit of distance used in ancient Rome. It measured approximately 1,000 double steps, or 5,000 Roman feet. One Roman foot (pes) was about 11.65 inches (29.6 cm), making the Roman mile roughly 4,850 feet or about 1,480 meters.

The Roman mile was used for measuring distances along roads across the Roman Empire, often marked by milestones (miliaria) placed at intervals of one mile. This system allowed for standardized road construction and efficient communication and transportation across vast territories.

Although shorter than the modern statute mile (1,609.344 meters), the Roman mile laid the foundation for the concept of mile-based distance measurement. The word "mile" itself originates from the Latin "mille," reflecting this Roman origin. Over time, the length of a mile evolved, eventually leading to the modern definitions used today.

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.