Joules to Electronvolts Converter
Enter the energy in joules below to convert it to electronvolts.
Convert Joules to Electronvolts
Enter a value in joules (J) to convert to electronvolts (eV).
Joule to Electronvolt Conversion Table
Table showing various joule measurements converted to electronvolts. Click any preset value or arrow to load it into the converter.
| Joules (J) | Electronvolts (eV) |
|---|---|
| 0.0000001 J | 624,150,907,446.0763 eV |
| 0.0000002 J | 1.248302e+12 eV |
| 0.0000003 J | 1.872453e+12 eV |
| 0.0000004 J | 2.496604e+12 eV |
| 0.0000005 J | 3.120755e+12 eV |
| 0.0000006 J | 3.744905e+12 eV |
| 0.0000007 J | 4.369056e+12 eV |
| 0.0000008 J | 4.993207e+12 eV |
| 0.0000009 J | 5.617358e+12 eV |
| 0.00000001 J | 62,415,090,744.607635 eV |
How to Convert Joules to Electronvolts
To convert joules to electronvolts, multiply the energy by the following conversion ratio: 6.241509e+18 electronvolts/joule.
Since one joule is equal to 6.241509e+18 electronvolts, you can use this simple formula to convert:
The energy in electronvolts is equal to the energy in joules multiplied by 6.241509e+18.
For example, here's how to convert 5 joules to electronvolts using the formula above.
How Many Electronvolts Are in a Joule?
There are 6.241509e+18 electronvolts in a joule, which is why we use this value in the formula above.
Our joule to electronvolt calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Joules and electronvolts are both units used to measure energy. Keep reading to learn more about each unit.
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. [1]
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.
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. [2]
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.
When converting energy between joules (J) and electronvolts (eV), keep full floating-point precision (1 J = 6.241509e+18 eV; 1 eV = 1.602177e-19 J) during intermediate calculations and round only the final electronvolt figure to match your instrument tolerance.
More Joule & Electronvolt Conversions
Need to calculate in the opposite direction? Use our electronvolts to joules converter (eV to J) to switch your starting unit immediately. You can also explore related tools such as converting joules to calories, converting joules to kilojoules, or converting calories to joules.
Convert from Joules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Joules (J) to Electronvolts (eV)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Joule (J) & Electronvolt (eV)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (J to eV)