Quickly convert joules to electron-volts and vice versa with Examples.com. Enter your data for fast and reliable energy conversions.
J to eV
Formula: Energy in Electronvolts (eV) = Energy in Joules (J) / 1.60218e-19
Joule :
Electronvolt :
| Joules | Electronvolts |
|---|---|
| 1 | 6241495961752113000 |
eV to J
Formula: Energy in Joules (J) = Energy in Electronvolts (eV) x 1.60218e-19
Electronvolt :
Joule :
| Electronvolts | Joules |
|---|---|
| 1 | 1.60218e-19 |
Conversion Factors:
- Joules to Electron-Volts: 1 joule = 6.242e+18 electron-volts
- Electron-Volts to Joules: 1 electron-volt = 1.602e-19 joules
How to Convert Joules to Electron-Volts:
To convert joules to electron-volts, divide the number of joules by 1.602e-19.
Electron-Volts = Joules/1.602e−19
Example:
Convert 3e-18 joules to electron-volts.
Electron-Volts = 3e−18/1.602e−19 = 18.73 eV
How to Convert Electron-Volts to Joules:
To convert electron-volts to joules, multiply the number of electron-volts by 1.602e-19.
Joules = Electron-Volts×1.602e−19
Example:
Convert 3e+19 electron-volts to joules.
Joules = 3e+19×1.602e−19 = 4.806 J
Joules to Electron-Volts Conversion Table
| Joules (J) | Electron-Volts (eV) |
|---|---|
| 1 J | 6.242e+18 eV |
| 2 J | 1.2484e+19 eV |
| 3 J | 1.8726e+19 eV |
| 4 J | 2.4968e+19 eV |
| 5 J | 3.121e+19 eV |
| 6 J | 3.7452e+19 eV |
| 7 J | 4.3694e+19 eV |
| 8 J | 4.9936e+19 eV |
| 9 J | 5.6178e+19 eV |
| 10 J | 6.242e+19 eV |
| 20 J | 1.2484e+20 eV |
| 30 J | 1.8726e+20 eV |
| 40 J | 2.4968e+20 eV |
| 50 J | 3.121e+20 eV |
| 60 J | 3.7452e+20 eV |
| 70 J | 4.3694e+20 eV |
| 80 J | 4.9936e+20 eV |
| 90 J | 5.6178e+20 eV |
| 100 J | 6.242e+20 eV |
J to eV Conversion Chart
Electron-Volts to Joules Conversion Table
| Electron-Volts (eV) | Joules (J) |
|---|---|
| 1 eV | 1.602e-19 J |
| 2 eV | 3.204e-19 J |
| 3 eV | 4.806e-19 J |
| 4 eV | 6.408e-19 J |
| 5 eV | 8.01e-19 J |
| 6 eV | 9.612e-19 J |
| 7 eV | 1.1214e-18 J |
| 8 eV | 1.2816e-18 J |
| 9 eV | 1.4418e-18 J |
| 10 eV | 1.602e-18 J |
| 20 eV | 3.204e-18 J |
| 30 eV | 4.806e-18 J |
| 40 eV | 6.408e-18 J |
| 50 eV | 8.01e-18 J |
| 60 eV | 9.612e-18 J |
| 70 eV | 1.1214e-17 J |
| 80 eV | 1.2816e-17 J |
| 90 eV | 1.4418e-17 J |
| 100 eV | 1.602e-17 J |
eV to J Conversion Chart
Difference Between Joules to Electron-Volts
| Aspect | Joule (J) | Electron-Volt (eV) |
|---|---|---|
| Definition | A unit of energy in the International System of Units (SI). | A unit of energy equal to the work done when an electron is moved through a potential difference of one volt. |
| Symbol | J | eV |
| Conversion Factor | 1 Joule = 6.242e+18 Electron-Volts | 1 Electron-Volt = 1.602e-19 Joules |
| Usage | Commonly used in physics and engineering. | Commonly used in atomic and particle physics. |
| Measurement Context | Measures energy in macroscopic systems. | Measures energy in microscopic systems like atoms and particles. |
| Common Application | Used to quantify work, heat, and energy transfer. | Used to indicate the energy levels of electrons and particles. |
| Scale | Suitable for large-scale energy measurements. | Suitable for small-scale energy measurements, such as in quantum mechanics. |
| Origin | Named after James Prescott Joule, an English physicist. | Derived from the charge of an electron and its potential difference. |
1. Solved Examples on Converting Joules to Electron-Volts
Example 1:
Convert 1 joule to electron-volts.
Electron-Volts = 11.602e−19 = 6.242e+18 eV
Example 2:
Convert 2 joules to electron-volts.
Electron-Volts = 21.602e−19 = 1.2484e+19 eV
Example 3:
Convert 0.5 joules to electron-volts.
Electron-Volts = 0.51.602e−19 = 3.121e+18 eV
Example 4:
Convert 3 joules to electron-volts.
Electron-Volts = 31.602e−19 = 1.8726e+19 eV
Example 5:
Convert 0.25 joules to electron-volts.
Electron-Volts = 0.251.602e−19 = 1.561e+18 eV
2. Solved Examples on Converting Electron-Volts to Joules
Example 1:
Convert 1 electron-volt to joules.
Joules = 1×1.602e−19 = 1.602e−19 J
Example 2:
Convert 5 electron-volts to joules.
Joules = 5×1.602e−19 = 8.01e−19 J
Example 3:
Convert 10 electron-volts to joules.
Joules = 10×1.602e−19 = 1.602e−18 J
Example 4:
Convert 20 electron-volts to joules.
Joules = 20×1.602e−19 = 3.204e−18 J
Example 5:
Convert 50 electron-volts to joules.
Joules = 50×1.602e−19 = 8.01e−18 J
Can I use online tools to convert joules to electron-volts?
Yes, many online calculators and tools are available to easily convert joules to electron-volts and vice versa.
What are some common applications of electron-volts?
Electron-volts are commonly used to measure the energy levels of electrons in atoms, the energy of particles in accelerators, and the energy of photons in spectroscopy.
How do I convert small amounts of energy from joules to electron-volts?
To convert small amounts of energy from joules to electron-volts, use the same conversion factor. For example, 1e-19 joules is equal to approximately 0.6242 electron-volts.
Why do we need to convert joules to electron-volts?
Converting joules to electron-volts is useful in atomic and particle physics, where energy levels are often expressed in electron-volts.
Is 1 joule equal to 1 electron-volt?
No, 1 joule is much larger than 1 electron-volt. 1 joule equals 6.242e+18 electron-volts.