Convert Electron Volts (eV) to Joules (J)
Convert Electron Volts to Joules instantly. 1 eV = 1.602000e-19 J, so multiply your eV value to get the equivalent in J.
Formula
1 eV = 1.602000e-19 J
To convert eV to J, divide the value by 6.242197e+18.
Conversion Table
| Electron Volts (eV) | Joules (J) |
|---|---|
| 0.01 eV | 1.6020e-21 J |
| 0.1 eV | 1.6020e-20 J |
| 0.5 eV | 8.0100e-20 J |
| 1 eV | 1.6020e-19 J |
| 2 eV | 3.2040e-19 J |
| 3 eV | 4.8060e-19 J |
| 5 eV | 8.0100e-19 J |
| 10 eV | 1.6020e-18 J |
| 15 eV | 2.4030e-18 J |
| 20 eV | 3.2040e-18 J |
| 25 eV | 4.0050e-18 J |
| 50 eV | 8.0100e-18 J |
| 100 eV | 1.6020e-17 J |
| 250 eV | 4.0050e-17 J |
| 500 eV | 8.0100e-17 J |
| 1000 eV | 1.6020e-16 J |
| 2500 eV | 4.0050e-16 J |
| 5000 eV | 8.0100e-16 J |
| 10000 eV | 1.6020e-15 J |
| 50000 eV | 8.0100e-15 J |
Common eV to J Examples
- 1 eV = 1.6020e-19 J
- 5 eV = 8.0100e-19 J
- 10 eV = 1.6020e-18 J
- 25 eV = 4.0050e-18 J
- 50 eV = 8.0100e-18 J
- 100 eV = 1.6020e-17 J
- 500 eV = 8.0100e-17 J
- 1000 eV = 1.6020e-16 J
About the units
Electron Volts (eV) — The electronvolt is the energy an electron gains across one volt (1.6 × 10⁻¹⁹ J) — the natural currency of particle physics, chemistry bonds and semiconductor band gaps.
Frequently Asked Questions
Where does the unit eV come from?
The electronvolt is the energy an electron gains across one volt (1.6 × 10⁻¹⁹ J) — the natural currency of particle physics, chemistry bonds and semiconductor band gaps.
Where does the unit J come from?
Joules is a Energy unit with its own historical and regional roots, now defined in relation to internationally agreed reference standards.
How many decimal places should I keep when converting eV to J?
For everyday use, 2 to 4 decimal places are enough. Scientific or engineering work may require 6 or more.
Can I convert J back to eV?
Yes. Simply invert the ratio: divide the J value by 1.602000e-19 to get the equivalent in eV.
What is the difference between eV and J?
Both measure Energy, but they belong to different unit systems or scales, which is why a conversion factor is needed between them.
Why are there different units for Energy?
Different regions and industries developed their own Energy standards over time. International trade and science later required conversion tools to bridge them.