Convert perch to picometer Online | Free Length Converter

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.

Picometer

A picometer (pm) is an extremely small unit of length in the metric system, equal to one-trillionth of a meter (1 pm = 10⁻¹² meters). Picometers are used to measure things on the atomic and subatomic scale, such as the size of atoms or the distance between particles in a molecule. For example, a hydrogen atom is about 50 picometers in radius. This unit is mainly used in physics, chemistry, and nanotechnology. Because it's so small, you won’t see picometers used in everyday life — they are only relevant in scientific research where ultra-precise measurements are required.