Electronvolts to Millijoules Converter
Enter the energy in electronvolts below to convert it to millijoules.
Convert Electronvolts to Millijoules
Enter a value in electronvolts (eV) to convert to millijoules (mJ).
Electronvolt to Millijoule Conversion Table
Table showing various electronvolt measurements converted to millijoules. Click any preset value or arrow to load it into the converter.
| Electronvolts (eV) | Millijoules (mJ) |
|---|---|
| 1 eV | 1.602177e-16 mJ |
| 10 eV | 1.602177e-15 mJ |
| 100 eV | 1.602177e-14 mJ |
| 1,000 eV | 1.602177e-13 mJ |
| 10,000 eV | 1.602177e-12 mJ |
| 100,000 eV | 1.602177e-11 mJ |
| 1,000,000 eV | 1.602177e-10 mJ |
| 5,000,000 eV | 8.010883e-10 mJ |
| 10,000,000 eV | 1.602177e-9 mJ |
| 25,400,000 eV | 4.069529e-9 mJ |
How to Convert Electronvolts to Millijoules
To convert electronvolts to millijoules, multiply the energy by the following conversion ratio: 1.602177e-16 millijoules/electronvolt.
Since one electronvolt is equal to 1.602177e-16 millijoules, you can use this simple formula to convert:
The energy in millijoules is equal to the energy in electronvolts multiplied by 1.602177e-16.
For example, here's how to convert 5 electronvolts to millijoules using the formula above.
How Many Millijoules Are in an Electronvolt?
There are 1.602177e-16 millijoules in an electronvolt, which is why we use this value in the formula above.
Our electronvolt to millijoule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Electronvolts and millijoules 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 Millijoule?
A millijoule is a unit of energy equal to 1/1,000 of a joule (0.001 J). One-thousandth of a Joule. [2]
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.
When converting energy between electronvolts (eV) and millijoules (mJ), keep full floating-point precision (1 eV = 1.602177e-16 mJ; 1 mJ = 6.241509e+15 eV) during intermediate calculations and round only the final millijoule figure to match your instrument tolerance.
More Electronvolt & Millijoule Conversions
Need to calculate in the opposite direction? Use our millijoules to electronvolts calculator to switch your starting unit immediately. You can also explore related tools such as converting millijoules to electronvolts, converting electronvolts to joules, or converting joules to calories.
Convert from Electronvolts
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Electronvolts (eV) to Millijoules (mJ)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Electronvolt (eV) & Millijoule (mJ)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (eV to mJ)