Power and Energy
eVtokJ
Convert electronvolts (eV) to kilojoules (kJ).
Factor1 eV = 1.602177e-22 kJ
Converter
eV
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kJ
Rendered to 6 significant figures.
Formula
Formula
kJ = eV × 1.602177e-22
Multiply any value in electronvolts by 1.602177e-22 to obtain the value in kilojoules.
Worked example
Convert 1e+9 eV to kJ.
- 01Start with 1e+9 eV.
- 02Multiply by the conversion factor: 1e+9 × 1.602177e-22 = 1.60218e-13 kJ.
Result1e+9 eV = 1.60218e-13 kJ
Conversion table
| eV | kJ |
|---|---|
| 1 | 1.6022e-22 |
| 2 | 3.2044e-22 |
| 5 | 8.0109e-22 |
| 10 | 1.6022e-21 |
| 20 | 3.2044e-21 |
| 50 | 8.0109e-21 |
| 100 | 1.6022e-20 |
| 200 | 3.2044e-20 |
| 500 | 8.0109e-20 |
| 1000 | 1.6022e-19 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from eV to kJ?
1 eV equals 1.602177e-22 kJ. To convert, multiply the value in electronvolts by 1.602177e-22.
How do I convert 1 eV to kJ?
1 eV = 1.60218e-22 kJ. For any value, multiply by 1.602177e-22.
How do I convert kJ back to eV?
Divide by the same factor — or equivalently, multiply by 6.241509e+21. So 1 kJ = 6.24151e+21 eV.
When would I need to convert electronvolt to kilojoule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).