Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 eV | 1.602e-22 J | |
| 0.01 eV | 1.602e-21 J | |
| 0.1 eV | 1.602e-20 J | |
| 1 eV | 1.602e-19 J | |
| 5 eV | 8.010e-19 J | |
| 10 eV | 1.602e-18 J | |
| 50 eV | 8.010e-18 J | |
| 100 eV | 1.602e-17 J | |
| 1000 eV | 1.602e-16 J |
Formula: Joule = Electron Volt × 1.6020e-19
Multiply any electron volt value by 1.6020e-19 to get joule.
Reverse: Electron Volt = Joule × 6.2422e18
Common electron volt values — factor: 1 eV = 1.6020e-19 J
| Electron Volt (eV) | Joule (J) | Context |
|---|---|---|
| 1 eV | 1.602e-19 J | Chemical bond |
| 100 eV | 1.602e-17 J | UV photon |
| 1e+04 eV | 1.602e-15 J | X-ray photon |
| 1e+06 eV | 1.602e-13 J | Gamma ray |
| 1.000e+09 eV | 1.602e-10 J | 1 GeV |
| 1.000e+12 eV | 1.602e-07 J | 1 TeV |
| 1.000e+15 eV | 0.0001602 J | LHC range |
| 1.000e+18 eV | 0.1602 J | Ultra-high cosmic ray |
| 1.000e+21 eV | 160.2 J | Macro scale |
| 1.000e+24 eV | 1.602e+05 J | Millijoule scale |
| 1.000e+27 eV | 1.602e+08 J | Joule scale |
| 1.000e+30 eV | 1.602e+11 J | kJ scale |
| 1.000e+33 eV | 1.602e+14 J | MJ scale |
| 1.000e+36 eV | 1.602e+17 J | GJ scale |
| 1.000e+40 eV | 1.602e+21 J | Extreme |
1 eV = 1.6020e-19 J. Memorize for instant estimates.
Use 1.6020e-19 as a quick mental multiplier.
Multiply result by 6.2422e18 to recover the original eV value.
Works with beam energies, collision products, and mass-energy in eV.
Designs band gap structures — silicon band gap is 1.12 eV.
Selects tube voltage in keV for optimal diagnostic X-ray imaging.
Optimizes solar cell efficiency based on photon energy in eV.
Calculates nuclear binding energies and decay Q-values in MeV.
Measures work function and ionization energy in electron volts.
The electron volt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, equal to approximately 1.602 × 10⁻¹⁹ joules. It was formally adopted as a unit by the IEC in 1930.
Electron volts are the standard energy unit in atomic physics, particle physics, and semiconductor engineering. Chemical bond energies are a few eV; X-ray photons are kiloelectron volts (keV); particle accelerators measure GeV and TeV.
Interesting fact: The Large Hadron Collider accelerates protons to 6.8 TeV (6.8 × 10¹² eV). Visible light photons have energies of 1.8–3.1 eV. The rest mass energy of an electron is 511 keV.
The joule is the SI derived unit of energy, work, and heat, defined as the energy transferred when a force of one newton moves an object one meter. It was named after James Prescott Joule, the English physicist who established the mechanical equivalent of heat in the 1840s.
The joule is universal in physics and engineering: kinetic energy (½mv²), potential energy (mgh), electrical energy (VIt), and heat are all measured in joules. One joule is the energy needed to lift a 100g apple one meter against gravity.
Interesting fact: The human heart expends about 1 joule of energy with each beat. A 60-watt light bulb uses 60 joules every second. The entire energy released by a 1-megaton nuclear weapon equals about 4.18 × 10¹⁵ joules.
Converting electron volt to joule is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 eV = 8.0100e-19 J and 10 eV = 1.6020e-18 J. Reverse: 1 J = 6.2422e18 eV. Exact factor: 1 eV = 1.6020e-19 J.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.