Millijoules to Electronvolts Converter
Enter the energy in millijoules below to convert it to electronvolts.
Convert Millijoules to Electronvolts
Enter a value in millijoules (mJ) to convert to electronvolts (eV).
Millijoule to Electronvolt Conversion Table
Table showing various millijoule measurements converted to electronvolts. Click any preset value or arrow to load it into the converter.
| Millijoules (mJ) | Electronvolts (eV) |
|---|---|
| 0.0000001 mJ | 624,150,907.4460763 eV |
| 0.0000002 mJ | 1,248,301,814.8921525 eV |
| 0.0000003 mJ | 1,872,452,722.3382287 eV |
| 0.0000004 mJ | 2,496,603,629.784305 eV |
| 0.0000005 mJ | 3,120,754,537.2303815 eV |
| 0.0000006 mJ | 3,744,905,444.6764574 eV |
| 0.0000007 mJ | 4,369,056,352.122534 eV |
| 0.0000008 mJ | 4,993,207,259.56861 eV |
| 0.0000009 mJ | 5,617,358,167.014687 eV |
| 0.00000001 mJ | 62,415,090.7446076 eV |
How to Convert Millijoules to Electronvolts
To convert millijoules to electronvolts, multiply the energy by the following conversion ratio: 6.241509e+15 electronvolts/millijoule.
Since one millijoule is equal to 6.241509e+15 electronvolts, you can use this simple formula to convert:
The energy in electronvolts is equal to the energy in millijoules multiplied by 6.241509e+15.
For example, here's how to convert 5 millijoules to electronvolts using the formula above.
How Many Electronvolts Are in a Millijoule?
There are 6.241509e+15 electronvolts in a millijoule, which is why we use this value in the formula above.
Our millijoule to electronvolt calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millijoules and electronvolts are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Millijoule?
A millijoule is a unit of energy equal to 1/1,000 of a joule (0.001 J). One-thousandth of a Joule. [1]
The millijoule is classified as a metric and SI-compatible unit of energy. Millijoules can be abbreviated as mJ; for example, 1 millijoule can be written as 1 mJ.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millijoule (mJ) a convenient decimal multiple of the joule (J).
In practice, millijoules (mJ) are widely used across fine-tolerance laboratory, analytical, and micro-scale energy measurements within SI metric 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 millijoules (mJ) and electronvolts (eV), keep full floating-point precision (1 mJ = 6.241509e+15 eV; 1 eV = 1.602177e-16 mJ) during intermediate calculations and round only the final electronvolt figure to match your instrument tolerance.
More Millijoule & Electronvolt Conversions
Need to calculate in the opposite direction? Use our electronvolts to millijoules calculator to switch your starting unit immediately. You can also explore related tools such as converting electronvolts to millijoules, converting joules to calories, or converting calories to joules.
Convert from Millijoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Millijoules (mJ) to Electronvolts (eV)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Millijoule (mJ) & Electronvolt (eV)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (mJ to eV)