Convert pound [lbs] to Atomic mass unit [u] Online | Free weight-and-mass Converter

Pound [lb or lbs]

The pound is a unit of mass commonly used in the imperial and U.S. customary systems.

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  1 pound = 0.45359237 kilograms (exact, by definition)

  
  
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  Symbol: lb (from Latin libra)

  
  
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  Widely used in the United States and a few other countries for body weight, food, and general mass measurements.

  
  
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  There are 16 ounces (oz) in 1 pound.

  
  

Key Facts:

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  1 lb = 16 oz

  
  
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  1 lb ≈ 0.454 kg

  
  
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  Common in everyday U.S. and UK usage

  
  
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  Not an SI unit, but legally defined for trade and commerce

  
  

While the pound is not part of the metric system, it remains a familiar unit in daily life for many people, especially in the U.S. and UK.

Atomic Mass Unit [u]

The atomic mass unit (u), also known as the unified atomic mass unit or dalton (Da), is a standard unit of mass used to express atomic and molecular weights.

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  1 u = 1/12 the mass of a carbon-12 atom

  
  
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  1 u ≈ 1.66053906660 × 10⁻²⁷ kilograms

  
  
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  Symbol: u or Da

  
  

Key Facts:

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  Used to measure the mass of atoms, molecules, and subatomic particles

  
  
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  1 hydrogen atom ≈ 1 u

  
  
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  Mass of a proton ≈ 1.007 u, neutron ≈ 1.008 u

  
  
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  Simplifies comparison of atomic-scale masses in chemistry and physics

  
  

The atomic mass unit provides a convenient and consistent way to express and compare very small masses at the atomic and molecular scale.