Convert electronvolt (eV) to joule (J).
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Joule to Electronvolt Converter (J to eV)
Convert joule (J) to electronvolt (eV).Unit Converter · Energy
Quick answer
1 joule (J) is approximately equal to 6.241509 × 10¹⁸ electronvolts (eV). 1 electronvolt (eV) is approximately equal to 1.602177 × 10⁻¹⁹ joules (J).
To convert J to eV, multiply the value in joules by 6.2415090745 × 10¹⁸. For example, 10 J = 6.24150907 × 10¹⁹ eV, and 100 J = 6.24150907 × 10²⁰ eV.
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Quick reference — joule to electronvolt
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How to convert joules to electronvolts
How many electronvolts are in a joule? 1 joule is about 6.241509 × 10¹⁸ electronvolts. This free J to eV converter and joule to electronvolt calculator gives the answer instantly for any value.
To convert joule (J) to electronvolt (eV), multiply the value in joules by 6.2415090745 × 10¹⁸.
eV = J × 6.2415090745 × 10¹⁸
- 1
Take the value in joules
For example, 25 J.
- 2
Multiply by 6.2415090745 × 10¹⁸
25 × 6.2415090745 × 10¹⁸.
- 3
Read the answer in electronvolts
25 J = 1.56037727 × 10²⁰ eV.
Joule to Electronvolt conversion table
Common values from 1 to 1,000 joules converted to electronvolts.
| Joule (J) | Electronvolt (eV) |
|---|---|
| 1 J | 6.24150907 × 10¹⁸ eV |
| 2 J | 1.24830181 × 10¹⁹ eV |
| 3 J | 1.87245272 × 10¹⁹ eV |
| 4 J | 2.49660363 × 10¹⁹ eV |
| 5 J | 3.12075454 × 10¹⁹ eV |
| 6 J | 3.74490544 × 10¹⁹ eV |
| 7 J | 4.36905635 × 10¹⁹ eV |
| 8 J | 4.99320726 × 10¹⁹ eV |
| 9 J | 5.61735817 × 10¹⁹ eV |
| 10 J | 6.24150907 × 10¹⁹ eV |
| 15 J | 9.36226361 × 10¹⁹ eV |
| 20 J | 1.24830181 × 10²⁰ eV |
| 25 J | 1.56037727 × 10²⁰ eV |
| Joule (J) | Electronvolt (eV) |
|---|---|
| 30 J | 1.87245272 × 10²⁰ eV |
| 40 J | 2.49660363 × 10²⁰ eV |
| 50 J | 3.12075454 × 10²⁰ eV |
| 60 J | 3.74490544 × 10²⁰ eV |
| 70 J | 4.36905635 × 10²⁰ eV |
| 75 J | 4.68113181 × 10²⁰ eV |
| 80 J | 4.99320726 × 10²⁰ eV |
| 90 J | 5.61735817 × 10²⁰ eV |
| 100 J | 6.24150907 × 10²⁰ eV |
| 250 J | 1.56037727 × 10²¹ eV |
| 500 J | 3.12075454 × 10²¹ eV |
| 1,000 J | 6.24150907 × 10²¹ eV |
About joules and electronvolts
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.
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.
J to eV: common questions
- How many electronvolts are in 1 joule?
- 1 joule (J) is approximately equal to 6.241509 × 10¹⁸ electronvolts (eV). In short: 1 J ≈ 6.241509 × 10¹⁸ eV.
- How do I convert joules to electronvolts?
- To convert J to eV, multiply the value in joules by 6.2415090745 × 10¹⁸. For example, 5 J = 3.12075454 × 10¹⁹ eV.
- What is 10 J in eV, and what is 100 J?
- 10 J = 6.24150907 × 10¹⁹ eV, and 100 J = 6.24150907 × 10²⁰ eV. The table above lists more values from 1 to 1,000.
- Is this J to eV 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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