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The Planck energy is the natural unit of energy, denoted by EP.
EP = c2(c <math>\hbar<math>/ G)1/2 ≈ 1019 GeV, 543 kWh or 1.956 × 109 J
where:
c is the speed of light in a vacuum
<math>\hbar<math> is Dirac's constant
G is the gravitational constant
The Planck energy is also the amount of energy contained in the Planck mass of about a small flea, not counting the kinetic and potential energies.
Planck energy is approx= 10 million million million GeV (1 with nineteen zeros following it). A more accurate measurement is provided above.
See also
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