Convert electronvolts to joules
1 eV = 0.0000000000000000001602176634 J — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1.602176634e-19J
Exact decimal: 0.0000000000000000001602176634
As a fraction: 801088317/5000000000000000000000000000
1 eV = 0.0000000000000000001602176634 J
How to convert electronvolts to joules
Multiply the number of electronvolts by 0.0000000000000000001602176634 to get joules.
The exact factor is 0.0000000000000000001602176634 — as a fraction, 801088317/5000000000000000000000000000.
Electronvolt: Exactly 1.602 176 634 × 10⁻¹⁹ J since the 2019 SI redefinition.
Electronvolt to Joule conversion table
| Electronvolts (eV) | Joules (J) |
|---|---|
| 1 eV | 1.6021766e-19 |
| 2 eV | 3.2043533e-19 |
| 3 eV | 4.8065299e-19 |
| 5 eV | 8.0108832e-19 |
| 10 eV | 1.6021766e-18 |
| 20 eV | 3.2043533e-18 |
| 25 eV | 4.0054416e-18 |
| 50 eV | 8.0108832e-18 |
| 100 eV | 1.6021766e-17 |
| 250 eV | 4.0054416e-17 |
| 500 eV | 8.0108832e-17 |
| 1000 eV | 1.6021766e-16 |
Joule to Electronvolt conversion table
| Joules (J) | Electronvolts (eV) |
|---|---|
| 1 J | 6.2415091e+18 |
| 2 J | 1.2483018e+19 |
| 3 J | 1.8724527e+19 |
| 5 J | 3.1207545e+19 |
| 10 J | 6.2415091e+19 |
| 20 J | 1.2483018e+20 |
| 25 J | 1.5603773e+20 |
| 50 J | 3.1207545e+20 |
| 100 J | 6.2415091e+20 |
| 250 J | 1.5603773e+21 |
| 500 J | 3.1207545e+21 |
| 1000 J | 6.2415091e+21 |
Frequently asked
How many joules are in a electronvolt?
One electronvolt equals 1.602176634e-19 joules (eV → J). That figure is exact, not rounded.
How do you convert electronvolts to joules?
Multiply the number of electronvolts by 0.0000000000000000001602176634 to get joules.
What is 1 J in electronvolts?
One joule is 6.241509074e+18 electronvolts.
What is 10 eV in J?
10 eV = 1.6021766e-18 J.
What exactly is a electronvolt?
Exactly 1.602 176 634 × 10⁻¹⁹ J since the 2019 SI redefinition.