Electron Rest Energy

The energy of an electron at rest is given by Einstein’s equation:

E = mc²

Where:

• m = \(9.109 \times 10^{-31}\) kg (mass of electron)
• c = \(3.00 \times 10^8\) m/s (speed of light)

Using these values:

E ≈ 8.187 × 10^-14 joules

or

E ≈ 0.511 MeV (mega-electron volts)