Electronvolts to Joules Converter
Enter the energy in electronvolts below to convert it to joules.
Convert Electronvolts to Joules
Enter a value in electronvolts (eV) to convert to joules (J).
Electronvolt to Joule Conversion Table
Table showing various electronvolt measurements converted to joules. Click any preset value or arrow to load it into the converter.
| Electronvolts (eV) | Joules (J) |
|---|---|
| 1 eV | 1.602177e-19 J |
| 10 eV | 1.602177e-18 J |
| 100 eV | 1.602177e-17 J |
| 1,000 eV | 1.602177e-16 J |
| 10,000 eV | 1.602177e-15 J |
| 100,000 eV | 1.602177e-14 J |
| 1,000,000 eV | 1.602177e-13 J |
| 5,000,000 eV | 8.010883e-13 J |
| 10,000,000 eV | 1.602177e-12 J |
| 25,400,000 eV | 4.069529e-12 J |
How to Convert Electronvolts to Joules
To convert electronvolts to joules, multiply the energy by the following conversion ratio: 1.602177e-19 joules/electronvolt.
Since one electronvolt is equal to 1.602177e-19 joules, you can use this simple formula to convert:
The energy in joules is equal to the energy in electronvolts multiplied by 1.602177e-19.
For example, here's how to convert 1000000 electronvolts to joules using the formula above.
How Many Joules Are in an Electronvolt?
There are 1.602177e-19 joules in an electronvolt, which is why we use this value in the formula above.
Our electronvolt to joule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Electronvolts and joules are both units used to measure energy. Keep reading to learn more about each unit.
What Is an Electronvolt?
An electronvolt is a unit of energy equal to 1/6,241,509,074,460,763,000 of a joule (1.602177e-19 J). Atomic energy unit equal to 1.602176634×10⁻¹⁹ Joules. [1]
The electronvolt is classified as an International System of Units (SI) unit of energy. Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.
When working with electronvolts (eV) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, electronvolts (eV) are widely used across fine-tolerance laboratory, analytical, and micro-scale energy measurements within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Joule?
Coherent SI unit of energy and work (1 W·s = 1 N·m). It serves as a primary reference unit for measuring energy across scientific and practical applications. [2]
The joule is classified as an International System of Units (SI) unit of energy. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.
As the primary coherent reference unit for energy in this category, all other energy units are mathematically anchored to the joule (J).
In practice, joules (J) are widely used across standard energy applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting energy between electronvolts (eV) and joules (J), keep full floating-point precision (1 eV = 1.602177e-19 J; 1 J = 6.241509e+18 eV) during intermediate calculations and round only the final joule figure to match your instrument tolerance.
More Electronvolt & Joule Conversions
Need to calculate in the opposite direction? Use our joules to electronvolts calculator to switch your starting unit immediately. You can also explore related tools such as converting joules to electronvolts, converting calories to joules, or converting kilojoules to joules.
Convert from Electronvolts
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Electronvolts (eV) to Joules (J)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Electronvolt (eV) & Joule (J)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (eV to J)