Joule to Electronvolt Converter
1 joule is about 6.241509074e+18 electronvolts. Convert joules (J) to electronvolts (eV) below: type a value and the result updates as you type.
J to eV calculator
Result
Joule to Electronvolt conversion
1 J ≈ 6.241509074e+18 eVone joule in electronvolts
1 eV = 1.602176634e-19 Jone electronvolt in joules
Joule (J): SI derived unit: one newton-meter.
Electronvolt (eV): Exactly 1.602176634e-19 joules (elementary charge × one volt).
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert joules to electronvolts
To convert joules to electronvolts, divide the number of joules by 1.602176634e-19.
Formula
eV = J ÷ 1.602176634e-19
Examples
- 5 J = 5 ÷ 1.602176634e-19 ≈ 3.120754537e+19 eV
- 25 J = 25 ÷ 1.602176634e-19 ≈ 1.560377269e+20 eV
- 100 J = 100 ÷ 1.602176634e-19 ≈ 6.241509074e+20 eV
Joule to Electronvolt conversion table
| Joule (J) | Electronvolt (eV) |
|---|---|
| 0.1 J | 6.241509074e+17 eV |
| 0.5 J | 3.120754537e+18 eV |
| 1 J | 6.241509074e+18 eV |
| 2 J | 1.248301815e+19 eV |
| 3 J | 1.872452722e+19 eV |
| 5 J | 3.120754537e+19 eV |
| 10 J | 6.241509074e+19 eV |
| 20 J | 1.248301815e+20 eV |
| 25 J | 1.560377269e+20 eV |
| 50 J | 3.120754537e+20 eV |
| 100 J | 6.241509074e+20 eV |
| 250 J | 1.560377269e+21 eV |
| 500 J | 3.120754537e+21 eV |
| 1000 J | 6.241509074e+21 eV |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many electronvolts are in one joule?
- One joule is about 6.241509074e+18 electronvolts.
- How do I convert electronvolts to joules?
- To convert electronvolts to joules, multiply the number of electronvolts by 1.602176634e-19. The formula is J = eV × 1.602176634e-19.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 1.602176634e-19 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a joule or a electronvolt?
- A joule is about 6.241509074e+18 times larger than a electronvolt. In other words, a electronvolt is 1.602176634e-19 of a joule.