---
title: "Electronvolts to Joules — eV to J converter"
description: "1 electronvolt = 1.602 × 10^-19 joules. Convert electronvolts to joules with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/electronvolts-to-joules/
site: "At One Place"
---

# Electronvolts to joules

**1 electronvolt in joules: 1 eV = 1.602 × 10^-19 J**

J = eV × 1.602176634 × 10^-19

To convert electronvolts to joules, multiply by 1.602176634 × 10^-19. The table below gives the values people look up most often, and the converter works for any number.

## Electronvolts to joules table

*Common electronvolt values converted to joules.*

| Electronvolts | Joules |
| --- | --- |
| 1 eV | 1.602 × 10^-19 |
| 2 eV | 3.204 × 10^-19 |
| 3 eV | 4.807 × 10^-19 |
| 4 eV | 6.409 × 10^-19 |
| 5 eV | 8.011 × 10^-19 |
| 10 eV | 1.602 × 10^-18 |
| 15 eV | 2.403 × 10^-18 |
| 20 eV | 3.204 × 10^-18 |
| 25 eV | 4.005 × 10^-18 |
| 30 eV | 4.807 × 10^-18 |
| 40 eV | 6.409 × 10^-18 |
| 50 eV | 8.011 × 10^-18 |
| 75 eV | 1.202 × 10^-17 |
| 100 eV | 1.602 × 10^-17 |
| 250 eV | 4.005 × 10^-17 |
| 500 eV | 8.011 × 10^-17 |
| 1,000 eV | 1.602 × 10^-16 |

## How the conversion works

The relationship is J = eV × 1.602176634 × 10^-19. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

### How many joules are in one electronvolt?

One electronvolt equals 1.602 × 10^-19 joules. J = eV × 1.602176634 × 10^-19.

### How do you convert electronvolts to joules?

Use J = eV × 1.602176634 × 10^-19. So 10 eV is 1.602 × 10^-18 J.

### How many electronvolts are in one joule?

One joule equals 6.2415091 × 10^18 electronvolts, which is the reverse of the conversion above.

## Related pages

- [Joules to Electronvolts](https://atoneplace.net/convert/joules-to-electronvolts/)
- [Electronvolts to Kilojoules](https://atoneplace.net/convert/electronvolts-to-kilojoules/)
- [Electronvolts to Kilocalories](https://atoneplace.net/convert/electronvolts-to-kcal/)
- [Electronvolts to Watt-hours](https://atoneplace.net/convert/electronvolts-to-watt-hours/)
- [Electronvolts to Kilowatt-hours](https://atoneplace.net/convert/electronvolts-to-kwh/)
- [Electronvolts to British thermal units](https://atoneplace.net/convert/electronvolts-to-btu/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)