What is an electron-volt (eV)?

An electron-volt is the energy gained by an electron when accelerated through a potential difference of one volt; it is used to measure energies at atomic and particle physics scales.

Why convert from electron-volt to millijoule?

Converting to millijoule allows expressing very small energy values in an SI-based unit convenient for scientific and engineering measurements involving low-power and small-scale energies.

Can this conversion be used for large energies?

No, this conversion is intended for extremely small energies; millijoule results will appear close to zero and need high precision.

How to Convert from Electron-volt [eV] to Millijoule [mJ]

Learn how to convert energy values from electron-volt (eV), a unit commonly used in atomic and particle physics, to millijoule (mJ), an SI-derived unit suitable for small-scale scientific and engineering energy measurements.

Electron-volt [eV]

Millijoule [mJ]

Please check your input. It must be a valid numeric value.

Electron-volt [eV] to Millijoule [mJ] Conversion Table

Electron-volt [eV]	Millijoule [mJ]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Electron-volt [eV] to Millijoule [mJ] Conversion Table
Electron-volt [eV]	Millijoule [mJ]

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What Is This Tool?

This tool enables you to convert energy measurements from electron-volts (eV), units typically used for atomic and particle energies, into millijoules (mJ), which are commonly used in engineering and science to represent small amounts of energy.

How to Use This Tool?

Enter the energy value in electron-volt (eV) you want to convert.
Select electron-volt [eV] as the input unit.
Select millijoule [mJ] as the output unit.
Click the convert button to get the equivalent energy in millijoules.
Interpret the result for applications requiring SI unit energy measurements.

Key Features

Converts energy values from electron-volt (eV) to millijoule (mJ).
Uses exact unit definitions based on SI standards and particle physics conventions.
Suitable for applications in physics, semiconductor engineering, and microelectronics.
Easy to use with straightforward value input and conversion steps.
Provides a precise conversion factor consistent with scientific standards.

Examples

5 eV converts to 8.0108831699995×10⁻¹⁶ mJ.
1 eV equals 1.6021766339999×10⁻¹⁶ mJ.

Common Use Cases

Describing photon and atomic electron excitation energies in physics.
Specifying semiconductor band gaps and electronic carrier energies.
Reporting energies of particle and nuclear reactions.
Quantifying pulse energy of low‑power lasers and LEDs.
Measuring small electronic event energies in microelectronic circuits.
Evaluating mechanical impact energies in microscale materials testing.

Tips & Best Practices

Ensure input values are accurate to get meaningful small-scale energy conversions.
Use the conversion primarily to bridge physics scales with engineering units.
Apply this conversion when working with energies much smaller than one joule.
Carefully interpret results as millijoule values will be very close to zero for typical eV inputs.

Limitations

Converted values in millijoules are extremely small and close to zero due to the scale difference.
High precision is required to represent the results meaningfully.
Not suitable for macroscopic or large-scale energy conversions.
Primarily intended for linking fundamental physics units with applied engineering contexts.

Frequently Asked Questions

What is an electron-volt (eV)?: An electron-volt is the energy gained by an electron when accelerated through a potential difference of one volt; it is used to measure energies at atomic and particle physics scales.
Why convert from electron-volt to millijoule?: Converting to millijoule allows expressing very small energy values in an SI-based unit convenient for scientific and engineering measurements involving low-power and small-scale energies.
Can this conversion be used for large energies?: No, this conversion is intended for extremely small energies; millijoule results will appear close to zero and need high precision.

Key Terminology

Electron-volt [eV]: A unit of energy representing the amount gained by an electron when accelerated through a potential difference of one volt, commonly used in physics at atomic and particle scales.
Millijoule [mJ]: An SI derived unit of energy equal to one thousandth of a joule, used in scientific and engineering fields to represent small quantities of energy.
Joule (J): The SI unit of energy defined as kg·m²·s⁻², serving as the base for units like millijoule.

Quick Knowledge Check

What does one electron-volt (eV) represent?

Energy gained by electron moving through one volt

Energy used in mechanical systems

Which unit is smaller in scale for typical energies measured in the tool?

Millijoule [mJ]

Electron-volt [eV]

Kelvin [K]

What is a common use case for converting eV to mJ?

Describing energies in atomic and particle physics

Measuring blood pressure

Calculating sound frequency

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