Electronvolts (eV) to Kilojoules (kJ) Converter
Enter a value to instantly convert between energy units.
1 Electronvolt = 1.6022e-22 Kilojoule
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
kJ = eV × 1.602177e-22One electronvolt equals 1.60 × 10⁻²² kilojoules. The eV is the atomic-scale energy unit (bond energies, ionization, semiconductors), while kJ is the SI standard. Converting eV to kJ is essential when publishing particle physics or materials science results in international journals that require SI units, or when comparing atomic phenomena with macroscopic energy scales.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
Hydrogen ionization energy: 13.6 eV = 2.18 × 10⁻²¹ kJ — fundamental constant in atomic physics.
13.6 eV = 2.18e-21 kJ
A nuclear reaction releases 1 MeV (10⁶ eV) = 1.602 × 10⁻¹⁶ kJ — for SI journal publication.
1000000 eV = 1.602e-16 kJ
A high-energy particle carries 1 GeV (10⁹ eV) = 0.1602 femtojoules = 1.602 × 10⁻¹³ kJ — recorded in SI.
1000000000 eV = 1.602e-13 kJ
Band gap of silicon: 1.1 eV. Typical semiconductor junction: 1.6 eV = 2.56 × 10⁻²² kJ in SI units.
1.6 eV = 2.56e-22 kJ