Convert Electron radius (classical) to Planck length Online | Free Length Converter

Classical Electron Radius

The classical electron radius is a theoretical length scale associated with the electron, derived from classical electromagnetism. It represents the size of a hypothetical sphere where the electron’s electrostatic energy equals its rest mass energy.

• 
  

  Its value is approximately 2.818 × 10⁻¹⁵ meters (about 2.8 femtometers).

  
  
• 
  

  Calculated using fundamental constants: the electron charge, mass, and the speed of light.

  
  
• 
  

  It is not the actual physical size of the electron (which is considered point-like in quantum mechanics), but a useful scale in classical physics.

  
  
• 
  

  Used in scattering theory and classical electron models.

  
  

Key facts:

• 
  

  Classical electron radius ≈ 2.818 × 10⁻¹⁵ m

  
  
• 
  

  Represents an electromagnetic length scale, not a physical size

  
  
• 
  

  Important in classical models of electron behavior

  
  

This radius helps bridge classical and quantum views of particle physics.