How to convert joules to electronvolts
To convert joules (J) to electronvolts (eV), multiply the value in joules by 6.241509074 × 10¹⁸.
eV = J × 6.241509074 × 10¹⁸
Example: 10 J = 6.241509074 × 10¹⁹ eV.
You can also type 10 J to eV into the smart calculator, or mix units: 1 J + 1 eV.
Joules to Electronvolts conversion table
| Joules | Electronvolts |
|---|---|
| 0.01 J | 6.2415091 × 10¹⁶ eV |
| 0.1 J | 6.2415091 × 10¹⁷ eV |
| 0.25 J | 1.5603773 × 10¹⁸ eV |
| 0.5 J | 3.1207545 × 10¹⁸ eV |
| 1 J | 6.2415091 × 10¹⁸ eV |
| 2 J | 1.2483018 × 10¹⁹ eV |
| 3 J | 1.8724527 × 10¹⁹ eV |
| 4 J | 2.4966036 × 10¹⁹ eV |
| 5 J | 3.1207545 × 10¹⁹ eV |
| 6 J | 3.7449054 × 10¹⁹ eV |
| 7 J | 4.3690564 × 10¹⁹ eV |
| 8 J | 4.9932073 × 10¹⁹ eV |
| 9 J | 5.6173582 × 10¹⁹ eV |
| 10 J | 6.2415091 × 10¹⁹ eV |
| 12 J | 7.4898109 × 10¹⁹ eV |
| 15 J | 9.3622636 × 10¹⁹ eV |
| 20 J | 1.2483018 × 10²⁰ eV |
| 25 J | 1.5603773 × 10²⁰ eV |
| 30 J | 1.8724527 × 10²⁰ eV |
| 40 J | 2.4966036 × 10²⁰ eV |
| 50 J | 3.1207545 × 10²⁰ eV |
| 60 J | 3.7449054 × 10²⁰ eV |
| 75 J | 4.6811318 × 10²⁰ eV |
| 100 J | 6.2415091 × 10²⁰ eV |
| 250 J | 1.5603773 × 10²¹ eV |
| 500 J | 3.1207545 × 10²¹ eV |
| 1,000 J | 6.2415091 × 10²¹ eV |
Converting electronvolts back to joules
1 eV = 1.602176634 × 10⁻¹⁹ J. See the Electronvolts to Joules converter, or press the swap button above.
About the units
Joule (J)
The SI unit of energy: one newton acting over one meter.
Electronvolt (eV)
Exactly 1.602176634 × 10⁻¹⁹ joules, used in atomic and particle physics.
Energy is the capacity to do work. The SI unit is the joule. Food energy is labelled in kilocalories (Calories with a capital C) or kilojoules, electricity is billed in kilowatt-hours, and heating often uses BTU or therms.
Questions and answers
How many electronvolts are in a joule?
One joule (J) equals 6.241509074 × 10¹⁸ electronvolts (eV).
How do I convert joules to electronvolts?
To convert joules to electronvolts, multiply the value in joules by 6.241509074 × 10¹⁸. The formula is eV = J × 6.241509074 × 10¹⁸. For example, 10 J = 6.2415091 × 10¹⁹ eV.
What is 10 J in eV?
10 joules is 6.241509074 × 10¹⁹ electronvolts.
Which is bigger, a joule or a electronvolt?
A joule is bigger: 1 J = 6.241509074 × 10¹⁸ eV.
Are Calories on food labels the same as calories?
No. The food Calorie (capital C) is a kilocalorie: 1,000 small calories, or 4.184 kilojoules.
Does this J to eV converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.