Convert Electronvolt to Joule
Use this free converter to change electronvolts (eV) into joules (J). Electronvolt and joule both measure energy. As a quick reference, 1 eV equals 1.6022e-19 J, and 1 J equals 6.2415e+18 eV.
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Joule (J)
1.6022e-19
1 eV = 1.6022e-19 J
Energy conversion table
| Electronvolt | Joule |
|---|---|
| 0.01 | 1.6022e-21 |
| 0.1 | 1.6022e-20 |
| 0.5 | 8.0109e-20 |
| 1 | 1.6022e-19 |
| 2 | 3.2044e-19 |
| 3 | 4.8065e-19 |
| 5 | 8.0109e-19 |
| 10 | 1.6022e-18 |
| 20 | 3.2044e-18 |
| 25 | 4.0054e-18 |
| 50 | 8.0109e-18 |
| 100 | 1.6022e-17 |
| 1,000 | 1.6022e-16 |
How to convert Electronvolt to Joule
Multiply the electronvolt value by 1.6022e-19 to get joules.
- Enter the number of electronvolts you want to convert.
- The converter instantly shows the equivalent value in joules.
- Worked example: 15 eV × 1.6022e-19 = 2.4033e-18 J.
- Use the swap button to reverse the conversion (joule to electronvolt).
About these units
Electronvolt (eV)
- Definition
- An electronvolt (eV) is the energy gained by an electron moving through a one-volt potential, a tiny amount of energy.
- History
- It became standard in atomic and particle physics in the 20th century.
- Current use
- Electronvolts measure energies of particles, photons, and chemical bonds.
Joule (J)
- Definition
- The joule (J) is the SI unit of energy, the work done by a force of one newton over one meter.
- History
- Named after physicist James Prescott Joule, who studied the link between heat and work.
- Current use
- Joules measure energy, work, and heat throughout science and engineering.
Frequently asked questions
How many joules are in a electronvolt?
There are 1.6022e-19 J in 1 eV. To convert, multiply the number of electronvolts by 1.6022e-19.
How do I convert electronvolts to joules?
Multiply the electronvolt value by 1.6022e-19 to get joules. For example, 10 eV = 1.6022e-18 J.
Is this electronvolt-to-joule converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Electronvolt to other energy units
| Unit | 1 Electronvolt equals |
|---|---|
| Joule (J) | 1.6022e-19 J |
| Kilojoule (kJ) | 1.6022e-22 kJ |
| Calorie (cal) | 3.8293e-20 cal |
| Kilocalorie (kcal) | 3.8293e-23 kcal |
| Watt Hour (Wh) | 4.4505e-23 Wh |
| Kilowatt Hour (kWh) | 4.4505e-26 kWh |
| British Thermal Unit (BTU) | 1.5186e-22 BTU |
| Foot-Pound (ft·lb) | 1.1817e-19 ft·lb |