Convert pennyweight [pwt] to kilogram kg Online | Free weight-and-mass Converter

Pennyweight (pwt)

The pennyweight (pwt) is a unit of mass traditionally used in the precious metals and jewelry industries. It is part of the troy and apothecary weight systems.

One pennyweight equals 1/20 of a troy ounce, or 24 grains, which is approximately 1.555 grams.

Pennyweights are commonly used to measure gold, silver, and gemstones, offering a precise small-scale weight unit for valuable materials.

Summary:

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  1 pennyweight = 1/20 troy ounce ≈ 1.555 grams

  
  
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  Used mainly in precious metals and jewelry

  
  
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  Part of the troy weight system

Kilogram (kg)

The kilogram is the SI base unit of mass, representing the amount of matter in an object.

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  It is symbolized as kg.

  
  
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  Since 2019, the kilogram is defined by fixing the value of the Planck constant to exactly $6.62607015 \times 10^{-34}$ joule seconds, linking mass to fundamental physical constants.

  
  
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  Before this, it was defined by a physical platinum-iridium prototype.

  
  
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  It is the only SI base unit still using the prefix "kilo" in its name.

  
  

Key points:

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  1 kg is the base unit of mass in the metric system

  
  
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  Defined using the Planck constant for high precision

  
  
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  Widely used globally in science, industry, and everyday life

  
  

The kilogram ensures accurate and universal mass measurements across the world.