Convert pica to X-unit Online | Free Length Converter

Pica

A pica is a unit of length commonly used in typography and printing to measure font sizes, line lengths, and spacing. It is equal to 1/6 of an inch, or exactly 12 points in the point system.

Key facts:

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  1 pica = 1/6 inch ≈ 4.233 millimeters

  
  
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  1 pica = 12 points

  
  
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  Used primarily in graphic design, printing, and typesetting

  
  
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  Helps standardize the measurement of fonts, columns, and layouts

  
  

The pica remains a fundamental unit in desktop publishing and print design, helping maintain consistency in text and page formatting.

X-unit

The X-unit (symbol: xu) is a very small unit of length used primarily to measure wavelengths of X-rays and gamma rays. It was introduced in the early 20th century for precision measurements in X-ray crystallography.

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  1 X-unit ≈ 0.1 picometers (pm) or 10⁻¹³ meters

  
  
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  It allows scientists to express extremely small wavelengths typical of X-rays, which are on the order of atomic spacing

  
  
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  The exact definition has varied historically, but the unit remains useful for comparing wavelengths in X-ray spectroscopy and crystallography

  
  

Though largely replaced by the picometer or ångström in modern usage, the X-unit played a crucial role in early developments of atomic-scale measurement.