Convert electronvolts to joules
1 eV = 1.6022 × 10^-19 J. Change the amount below, or read the formula and the reference table further down.
1 electronvolt equals
joules
1 eV = 1.6022 × 10^-19 J
The formula
Electronvolts and joules both measure energy from the same zero, so a single multiplier does the job.
J = eV × 1.6022 × 10^-19
Going the other way? Convert joules to electronvolts.
Electronvolts to joules table
Common values, rounded for reading.
| Electronvolts (eV) | Joules (J) |
|---|---|
| 1 | 1.6022 × 10^-19 |
| 2 | 3.2044 × 10^-19 |
| 3 | 4.8065 × 10^-19 |
| 4 | 6.4087 × 10^-19 |
| 5 | 8.0109 × 10^-19 |
| 6 | 9.6131 × 10^-19 |
| 7 | 1.1215 × 10^-18 |
| 8 | 1.2817 × 10^-18 |
| 9 | 1.4420 × 10^-18 |
| 10 | 1.6022 × 10^-18 |
| 15 | 2.4033 × 10^-18 |
| 20 | 3.2044 × 10^-18 |
| 25 | 4.0054 × 10^-18 |
| 30 | 4.8065 × 10^-18 |
| 40 | 6.4087 × 10^-18 |
| 50 | 8.0109 × 10^-18 |
| 75 | 1.2016 × 10^-17 |
| 100 | 1.6022 × 10^-17 |
| 250 | 4.0054 × 10^-17 |
| 500 | 8.0109 × 10^-17 |
| 1,000 | 1.6022 × 10^-16 |
Questions people ask
- How many joules are in a electronvolt?
- One electronvolt equals 1.6022 × 10^-19 joules.
- How do I convert electronvolts to joules by hand?
- Multiply the number of electronvolts by 1.6022 × 10^-19. For a rough check, 1.6022 × 10^-19 is close enough for most everyday use.
- What is 1 electronvolt in joules?
- 1 electronvolt is 1.6022 × 10^-19 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.