Joules to electronvolts converter
Electronvolts (eV)
1 joule = 6.241509e+18 electronvolts
How to convert joules to electronvolts
eV = J × 6.24150907446 × 10^18
Multiply the number of joules by 6.24150907446 × 10^18 to get electronvolts. Going the other way, divide by 6.24150907446 × 10^18 (or multiply by 1.602176634 × 10^-19).
One joule is exactly defined as 6.24150907446 × 10^18 electronvolts (to 12 significant figures), and one electronvolt is 1.602176634 × 10^-19 joules.
Worked examples
- Convert 5 joules: 5 × 6.24150907446 × 10^18 = 3.120755e+19 3.120755e+19 electronvolts.
- Convert 12.5 joules: 12.5 × 6.24150907446 × 10^18 = 7.801886e+19 7.801886e+19 electronvolts.
- Convert 250 joules: 250 × 6.24150907446 × 10^18 = 1.560377e+21 1.560377e+21 electronvolts.
Quick-reference table
| J | eV |
|---|---|
| 1 | 6.241509e+18 |
| 2 | 1.248302e+19 |
| 3 | 1.872453e+19 |
| 5 | 3.120755e+19 |
| 10 | 6.241509e+19 |
| 15 | 9.362264e+19 |
| 20 | 1.248302e+20 |
| 25 | 1.560377e+20 |
| 50 | 3.120755e+20 |
| 75 | 4.681132e+20 |
| 100 | 6.241509e+20 |
| 1,000 | 6.241509e+21 |
| eV | J |
|---|---|
| 1 | 1.602177e-19 |
| 2 | 3.204353e-19 |
| 3 | 4.80653e-19 |
| 5 | 8.010883e-19 |
| 10 | 1.602177e-18 |
| 15 | 2.403265e-18 |
| 20 | 3.204353e-18 |
| 25 | 4.005442e-18 |
| 50 | 8.010883e-18 |
| 75 | 1.201632e-17 |
| 100 | 1.602177e-17 |
| 1,000 | 1.602177e-16 |
Related conversions
Frequently asked questions
How many electronvolts are in 1 joule?
1 joule equals 6.241509e+18 electronvolts.
What is the formula to convert joules to electronvolts?
Use eV = J × 6.24150907446 × 10^18. Multiply the number of joules by 6.24150907446 × 10^18 to get electronvolts. Going the other way, divide by 6.24150907446 × 10^18 (or multiply by 1.602176634 × 10^-19).
What is 100 joules in electronvolts?
100 joules is 6.241509e+20 electronvolts.