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Lorentz Factor & Relativistic KE Calculator

γ, total energy, and KE = (γ − 1) · m · c².

Compute the Lorentz factor γ, the total relativistic energy E = γmc², and the relativistic kinetic energy KE = (γ − 1) · m · c² of a moving particle.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

γ = 1 / √(1 − β²); E = γmc²; KE = (γ − 1) m c².

In depth

Compute the Lorentz factor γ, the total relativistic energy E = γmc², and the relativistic kinetic energy KE = (γ − 1) · m · c² of a moving particle.