Home Energy Electronvolt eVWhat is a Electronvolt? Energy UnitAbout ElectronvoltsThe electronvolt (eV) is a unit of energy.All Electronvolt Conversions Electronvolts to Joules eV → J Electronvolts to Kilojoules eV → kJ Electronvolts to Calories eV → cal Electronvolts to Kilocalories eV → kcal Electronvolts to Watt Hours eV → Wh Electronvolts to Kilowatt Hours eV → kWh Electronvolts to BTUs eV → BTU Electronvolts to Therms eV → thm