Convert eV to joules
Convert electronvolts to joules by entering a value below.
How to Convert Electronvolts to Joules
The electronvolt and joule are both units of energy. By definition, 1 joule equals exactly 6.2415090745e18 electronvolts. This means to convert electronvolts to joules, you divide by 6.2415090745e18.
Formula
Step-by-Step Example
Convert 5 eV to joules:
We need to convert electronvolts to joules
Since 1 J = 6.2415090745e18 eV, divide by 6.2415090745e18
5 ÷ 6.2415090745e18 = 8.01088317e-19
5 eV = 8.01088317e-19 J
Electronvolt to Joule Conversion Table
Quick reference table for common electronvolt to joule conversions. Click any value for detailed calculation.
| Electronvolts (eV) | Joules (J) |
|---|---|
| 0.1 eV | 1.602176634e-20 J |
| 0.5 eV | 8.01088317e-20 J |
| 1 eV | 1.602176634e-19 J |
| 2 eV | 3.204353268e-19 J |
| 5 eV | 8.01088317e-19 J |
| 10 eV | 1.602176634e-18 J |
| 25 eV | 4.005441585e-18 J |
| 50 eV | 8.01088317e-18 J |
| 100 eV | 1.602176634e-17 J |
About These Units
Electronvolt (eV)
An electronvolt (eV) is the energy gained by an electron accelerated through 1 volt potential difference, equal to 1.602×10⁻¹⁹ joules. Electronvolts measure atomic and molecular energies, photon energy (visible light: 1.6-3.3 eV), and particle physics. X-rays range from 100 eV to 100 keV.
Joule (J)
The joule (J) is the SI unit of energy equal to one watt-second or one newton-meter. Joules measure work, heat, and electrical energy. One joule equals approximately 0.239 calories. Lifting a 100g apple one meter requires about 1 joule. Named after physicist James Prescott Joule.
Frequently Asked Questions
How do I convert electronvolts to joules?
To convert electronvolts to joules, divide the value by 6.2415090745e18. For example, 10 eV = 1.602176634e-18 J.
How many joules are in 1 electronvolt?
1 electronvolt equals 1.602176634e-19 joules.
What is the formula for electronvolts to joules?
The formula is: J = eV ÷ 6.2415090745e18.