Power and Energy
eVtoJ
Convert electronvolts (eV) to joules (J).
Factor1 eV = 1.602177e-19 J
Converter
eV
Accepts numbers or expressions, e.g. 150 + 14.7
Result
J
Rendered to 6 significant figures.
Formula
Formula
J = eV × 1.602177e-19
Multiply any value in electronvolts by 1.602177e-19 to obtain the value in joules.
Worked example
Convert 1.00000e+6 eV to J.
- 01Start with 1.00000e+6 eV.
- 02Multiply by the conversion factor: 1.00000e+6 × 1.602177e-19 = 1.60218e-13 J.
Result1.00000e+6 eV = 1.60218e-13 J
Conversion table
| eV | J |
|---|---|
| 1 | 1.6022e-19 |
| 2 | 3.2044e-19 |
| 5 | 8.0109e-19 |
| 10 | 1.6022e-18 |
| 20 | 3.2044e-18 |
| 50 | 8.0109e-18 |
| 100 | 1.6022e-17 |
| 200 | 3.2044e-17 |
| 500 | 8.0109e-17 |
| 1000 | 1.6022e-16 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from eV to J?
1 eV equals 1.602177e-19 J. To convert, multiply the value in electronvolts by 1.602177e-19.
How do I convert 1 eV to J?
1 eV = 1.60218e-19 J. For any value, multiply by 1.602177e-19.
How do I convert J back to eV?
Divide by the same factor — or equivalently, multiply by 6.241509e+18. So 1 J = 6.24151e+18 eV.
When would I need to convert electronvolt to joule?
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).