How to convert joules to electronvolts
Formula: eV = J × 6.24151 × 10¹⁸
Worked example: 1,000 J → 1,000 × 6.24151 × 10¹⁸ = 6.24151 × 10²¹ eV
Joules to electronvolts conversion chart
| Joules (J) | Electronvolts (eV) |
|---|---|
| 1 J | 6.24151 × 10¹⁸ eV |
| 2 J | 1.2483 × 10¹⁹ eV |
| 3 J | 1.87245 × 10¹⁹ eV |
| 4 J | 2.4966 × 10¹⁹ eV |
| 5 J | 3.12075 × 10¹⁹ eV |
| 6 J | 3.74491 × 10¹⁹ eV |
| 7 J | 4.36906 × 10¹⁹ eV |
| 8 J | 4.99321 × 10¹⁹ eV |
| 9 J | 5.61736 × 10¹⁹ eV |
| 10 J | 6.24151 × 10¹⁹ eV |
| 12 J | 7.48981 × 10¹⁹ eV |
| 15 J | 9.36226 × 10¹⁹ eV |
| 20 J | 1.2483 × 10²⁰ eV |
| 25 J | 1.56038 × 10²⁰ eV |
| 30 J | 1.87245 × 10²⁰ eV |
| 40 J | 2.4966 × 10²⁰ eV |
| 50 J | 3.12075 × 10²⁰ eV |
| 75 J | 4.68113 × 10²⁰ eV |
| 100 J | 6.24151 × 10²⁰ eV |
| 250 J | 1.56038 × 10²¹ eV |
| 500 J | 3.12075 × 10²¹ eV |
| 1,000 J | 6.24151 × 10²¹ eV |
What is a joule?
The joule is the SI unit of energy: the work done by a force of one newton over one meter, or one watt for one second. It is small; lifting an apple about one meter takes roughly one joule.
What is an electronvolt?
The electronvolt is the energy an electron gains across one volt, exactly 1.602176634 × 10⁻¹⁹ joule. Physicists and chemists use it for atoms, photons and particles; visible light photons carry about 2 to 3 eV.