Electronvolts to Joules

Convert Electronvolt to Joule instantly. Quick and accurate energy conversion for science, nutrition, and everyday applications.

eV to J Converter

This tool converts electronvolt (eV) into joule (J) instantly and accurately. Type a value and the result appears as you type — no convert button, no waiting.

Conversion formula: J = eV × 1.602177e-19. To reverse it: eV = J × 6.241509e+18.

Understanding the Units

electronvolt (eV)

A tiny unit of energy used in particle physics. The energy gained by an electron through 1 volt.

joule (J)

The SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.

Who Uses This Conversion?

Engineers: matching energy specifications across measurement systems
Scientists & students: converting energy data for research and coursework
Technicians: sizing heating, cooling, and power equipment
Everyday users: understanding utility bills and product ratings

How to Use

Enter the eV value

Type your number into the first field. Decimals are allowed for precise values.

Read the J result

The second field updates instantly with the converted value, formatted with thousand separators.

Swap or copy

Use the swap button to reverse the direction, or the copy button to copy either value to your clipboard.

Reverse Conversion

Need to go the other way? Click the swap button (↔) to flip the units, or simply type into the J field — the converter is fully bidirectional.

Features

Instant & Bidirectional

Results update as you type in either field, using precise conversion factors. No convert button required.

Searchable Unit Menus

Each dropdown has a search box, so you can switch to Joules, calories, kWh, BTU, and many other energy units in seconds.

One-Click Copy

A copy button next to each field puts the value on your clipboard for documents, spreadsheets, or emails.

Quick Reference Table

Common conversions are listed below the tool for at-a-glance lookups without typing.

Works on Any Device

The layout adapts to desktop, tablet, and phone screens so you can convert anywhere.

Fully Private

Every calculation runs in your browser. Nothing you enter is stored or sent to a server.

Frequently Asked Questions

How do I convert eV to J?

Multiply the eV value by 1.602177e-19. For example, 1 eV = 1.602177e-19 J.

What is the formula for eV to J?

The formula is J = eV × 1.602177e-19. To convert back, use eV = J × 6.241509e+18.

Is this converter accurate?

Yes. It uses internationally recognized conversion factors with high precision, suitable for both scientific and everyday use.

Can I convert other energy units?

Yes. Use the dropdown menus to pick from many energy units including joules (J), calories (cal), kilocalories (kcal), kilowatt-hours (kWh), BTU, and more.