Joules to eV Converter

A joules to electron volts converter switches between the SI unit of energy (joule) and the electron volt (eV) used in atomic, nuclear, and particle physics. Use this calculator for accurate, instant results.

The calculator uses the standard published formula for joules to electron volts. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: 1 eV = 1.602176634 × 10⁻¹⁹ J (exact by definition). Each step in the calculation is shown so you can verify the result manually.