Electron Volt to Joule Converter Calculator

Calculator Inputs

Use single mode for one value or range mode for multiple rows.

Mode

Input Unit

Number Format

Decimal Places

Single Input Value

Range Start

Range End

Range Step

Formula Used

Primary conversion

J = eV × 1.602176634 × 10^-19

Where J is energy in joules and eV is energy in electron volts.

Prefixed unit normalization

eV = entered value × unit scale

Examples: 1 keV = 1,000 eV, 1 MeV = 1,000,000 eV, and 1 GeV = 1,000,000,000 eV.

Range mode repeats the same formula for every step between the start and end values, then lists and graphs the joule results.

How to Use This Calculator

Select Single Value or Range mode.
Choose the input unit such as eV, keV, MeV, or GeV.
Enter one value or fill the range start, end, and step fields.
Choose decimal places and your preferred display notation.
Press Convert Now to show the result below the header and above the form.
Review the graph and result table.
Use the export buttons to save the output as CSV or PDF.

Example Data Table

Input	Equivalent eV	Joules
1 eV	1 eV	1.602176634e-19 J
10 eV	10 eV	1.602176634e-18 J
1 keV	1000 eV	1.602176634e-16 J
2 MeV	2000000 eV	3.204353268e-13 J
5 GeV	5000000000 eV	8.010883170e-10 J

FAQs

1) What is an electron volt?

An electron volt is a small energy unit. It equals the energy gained by one electron moving through a potential difference of one volt.

2) Why are joule values usually very small here?

The joule is a much larger SI energy unit. Small particle-scale energies, such as eV values, become tiny decimal numbers when expressed in joules.

3) Is the eV to joule conversion exact?

Yes. This page uses 1 eV = 1.602176634 × 10^-19 J, based on the exact elementary charge used in modern SI definitions.

4) Can I enter keV, MeV, or GeV values?

Yes. Choose the input unit first. The calculator normalizes that unit into eV, then applies the joule conversion automatically.

5) Why should I use scientific notation?

Scientific notation keeps extremely small or large numbers readable. It is especially useful in physics, lab work, particle studies, and technical reports.

6) What does range mode do?

Range mode converts many evenly spaced input values in one run. It also fills the results table and generates a graph for trend inspection.

7) Are negative values allowed?

The calculator accepts negative inputs mathematically. That can help with signed energy differences, but many physical energy measurements are reported as positive magnitudes.

8) Can I export my results?

Yes. Use the CSV button for spreadsheet-friendly data or the PDF button for a formatted document you can share or archive.