Electronvolts (eV) to Joules (J) Conversion
Electronvolts
The electronvolt (eV) is a unit of energy equal to exactly 1.602176634 × 10⁻¹⁹ joules, defined as the kinetic energy gained by a single electron accelerated through a potential difference of one volt. It is the standard unit in particle physics, atomic physics, and solid-state physics. Visible light photons carry 1.8–3.1 eV of energy; X-ray photons carry 100 eV to 100 keV; the proton beams at CERN's LHC reach 6.5 teraelectronvolts (TeV).
Joules
The joule (J) is the SI derived unit of energy, work, and heat, defined as the work done when a force of one newton displaces an object by one metre (J = N·m = kg·m²·s⁻²). Named after James Prescott Joule, who established the mechanical equivalent of heat in the 1840s, the joule unifies all forms of energy — mechanical, thermal, electrical, chemical, and nuclear — under one framework. One joule is small: lifting an apple (≈100 g) one metre requires about 1 joule, while a human at rest metabolises approximately 80 joules per second.
| Electronvolts (eV) | Joules (J) |
|---|---|
| 0.1 eV | 0.000000000000000000016 J |
| 1 eV | 0.00000000000000000016 J |
| 2 eV | 0.00000000000000000032 J |
| 3 eV | 0.000000000000000000481 J |
| 5 eV | 0.000000000000000000801 J |
| 10 eV | 0.0000000000000000016 J |
| 20 eV | 0.0000000000000000032 J |
| 30 eV | 0.00000000000000000481 J |
| 50 eV | 0.00000000000000000801 J |
| 100 eV | 0.000000000000000016 J |
| 1000 eV | 0.00000000000000016 J |
Frequently Asked Questions (FAQ)
How many joules are in 1 electronvolts?
1 electronvolts (eV) is exactly 0 joules (J).
How do I convert electronvolts to joules?
Multiply the value in electronvolts by 0 to get the result in joules. Or use the converter above — type any number and see the result instantly.