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

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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:



  • 1 US survey furlong = 660 US survey feet



  • 1 US survey furlong ≈ 220 yards



  • 1 US survey furlong ≈ 201.1684 meters



  • 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.


Rod (US Survey)


The US survey rod is a unit of length used in U.S. land surveying. It is defined as exactly 16.5 US survey feet, which is slightly longer than the international foot. Since one US survey foot equals approximately 0.3048006096 meters, the US survey rod measures about 5.0292 meters.


The survey rod, also called a pole or perch, is historically significant in the U.S. Public Land Survey System and is used to measure land boundaries and distances.


Key facts:



  • 1 US survey rod = 16.5 US survey feet



  • 1 US survey rod ≈ 5.0292 meters



  • 4 US survey rods = 1 US survey chain



  • 40 US survey rods = 1 US survey furlong



Though the US survey foot and related units are being phased out in favor of international units, the US survey rod still appears in legal land descriptions and older surveying documents.




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