Convert joule (J) to electronvolt (eV).
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Electronvolt to Joule Converter (eV to J)
Convert electronvolt (eV) to joule (J).Unit Converter · Energy
Quick answer
1 electronvolt (eV) is approximately equal to 1.602177 × 10⁻¹⁹ joules (J). 1 joule (J) is approximately equal to 6.241509 × 10¹⁸ electronvolts (eV).
To convert eV to J, multiply the value in electronvolts by 1.602176634 × 10⁻¹⁹. For example, 10 eV = 1.60217663 × 10⁻¹⁸ J, and 100 eV = 1.60217663 × 10⁻¹⁷ J.
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Quick reference — electronvolt to joule
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How to convert electronvolts to joules
How many joules are in an electronvolt? 1 electronvolt is about 1.602177 × 10⁻¹⁹ joules. This free eV to J converter and electronvolt to joule calculator gives the answer instantly for any value.
To convert electronvolt (eV) to joule (J), multiply the value in electronvolts by 1.602176634 × 10⁻¹⁹.
J = eV × 1.602176634 × 10⁻¹⁹
- 1
Take the value in electronvolts
For example, 25 eV.
- 2
Multiply by 1.602176634 × 10⁻¹⁹
25 × 1.602176634 × 10⁻¹⁹.
- 3
Read the answer in joules
25 eV = 4.00544158 × 10⁻¹⁸ J.
Electronvolt to Joule conversion table
Common values from 1 to 1,000 electronvolts converted to joules.
| Electronvolt (eV) | Joule (J) |
|---|---|
| 1 eV | 1.60217663 × 10⁻¹⁹ J |
| 2 eV | 3.20435327 × 10⁻¹⁹ J |
| 3 eV | 4.8065299 × 10⁻¹⁹ J |
| 4 eV | 6.40870654 × 10⁻¹⁹ J |
| 5 eV | 8.01088317 × 10⁻¹⁹ J |
| 6 eV | 9.6130598 × 10⁻¹⁹ J |
| 7 eV | 1.12152364 × 10⁻¹⁸ J |
| 8 eV | 1.28174131 × 10⁻¹⁸ J |
| 9 eV | 1.44195897 × 10⁻¹⁸ J |
| 10 eV | 1.60217663 × 10⁻¹⁸ J |
| 15 eV | 2.40326495 × 10⁻¹⁸ J |
| 20 eV | 3.20435327 × 10⁻¹⁸ J |
| 25 eV | 4.00544158 × 10⁻¹⁸ J |
| Electronvolt (eV) | Joule (J) |
|---|---|
| 30 eV | 4.8065299 × 10⁻¹⁸ J |
| 40 eV | 6.40870654 × 10⁻¹⁸ J |
| 50 eV | 8.01088317 × 10⁻¹⁸ J |
| 60 eV | 9.6130598 × 10⁻¹⁸ J |
| 70 eV | 1.12152364 × 10⁻¹⁷ J |
| 75 eV | 1.20163248 × 10⁻¹⁷ J |
| 80 eV | 1.28174131 × 10⁻¹⁷ J |
| 90 eV | 1.44195897 × 10⁻¹⁷ J |
| 100 eV | 1.60217663 × 10⁻¹⁷ J |
| 250 eV | 4.00544158 × 10⁻¹⁷ J |
| 500 eV | 8.01088317 × 10⁻¹⁷ J |
| 1,000 eV | 1.60217663 × 10⁻¹⁶ J |
About electronvolts and joules
Electronvolt (eV)
An electronvolt (eV) is about 1.602 × 10⁻¹⁹ joules, the energy an electron gains across one volt. It is used in atomic and particle physics.
Joule (J)
The joule (J) is the SI unit of energy: the work done by a force of one newton over one meter. One watt is one joule per second.
eV to J: common questions
- How many joules are in 1 electronvolt?
- 1 electronvolt (eV) is approximately equal to 1.602177 × 10⁻¹⁹ joules (J). In short: 1 eV ≈ 1.602177 × 10⁻¹⁹ J.
- How do I convert electronvolts to joules?
- To convert eV to J, multiply the value in electronvolts by 1.602176634 × 10⁻¹⁹. For example, 5 eV = 8.01088317 × 10⁻¹⁹ J.
- What is 10 eV in J, and what is 100 eV?
- 10 eV = 1.60217663 × 10⁻¹⁸ J, and 100 eV = 1.60217663 × 10⁻¹⁷ J. The table above lists more values from 1 to 1,000.
- Is this eV to J converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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