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

Link (US Survey)

The US survey link is a unit of length used in the United States for land surveying, defined as exactly 7.92 US survey inches. Since one US survey inch is slightly longer than the international inch (due to the US survey foot), the US survey link is approximately 0.201168 meters.

It is part of the US survey system, derived from Gunter’s chain, which is divided into 100 links per chain (66 US survey feet). Links are used to measure small distances in surveying and land measurement.

Key facts:

• 
  

  1 US survey link = 7.92 US survey inches

  
  
• 
  

  1 US survey link ≈ 0.201168 meters

  
  
• 
  

  100 links = 1 US survey chain (66 US survey feet)

  
  
• 
  

  25 links = 1 US survey rod (16.5 US survey feet)

  
  

Though the US survey units are being phased out, the US survey link still appears in historical land records and legal surveying documents.

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.

Key facts:

• 
  

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

  
  
• 
  

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

  
  
• 
  

  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.