Convert a.u. of length to rod (US survey) Online | Free Length Converter

Astronomical Unit (a.u.) of Length

The astronomical unit (a.u.) is a unit of length used primarily in astronomy to describe distances within our solar system. It is defined as the average distance between the Earth and the Sun.

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  1 astronomical unit ≈ 149,597,870.7 kilometers (about 93 million miles)

  
  
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  Used to measure distances between planets and other objects in the solar system

  
  
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  Provides a convenient scale for expressing space distances that are too large for kilometers but too small for light-years

  
  

The astronomical unit helps astronomers communicate and calculate orbits, planetary positions, and space missions with clarity and precision.

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.

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  1 US survey rod = 16.5 US survey feet

  
  
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  1 US survey rod ≈ 5.0292 meters

  
  
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  4 US survey rods = 1 US survey chain

  
  
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  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.