---
title: "Kilojoules to Electronvolts — kJ to eV converter"
description: "1 kilojoule = 6.2415091 × 10^21 electronvolts. Convert kilojoules to electronvolts with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/kilojoules-to-electronvolts/
site: "At One Place"
---

# Kilojoules to electronvolts

**1 kilojoule in electronvolts: 1 kJ = 6.2415091 × 10^21 eV**

eV = kJ × 6.241509074 × 10^21

To convert kilojoules to electronvolts, multiply by 6.241509074 × 10^21. The table below gives the values people look up most often, and the converter works for any number.

## Kilojoules to electronvolts table

*Common kilojoule values converted to electronvolts.*

| Kilojoules | Electronvolts |
| --- | --- |
| 1 kJ | 6.2415091 × 10^21 |
| 2 kJ | 1.2483018 × 10^22 |
| 3 kJ | 1.8724527 × 10^22 |
| 4 kJ | 2.4966036 × 10^22 |
| 5 kJ | 3.1207545 × 10^22 |
| 10 kJ | 6.2415091 × 10^22 |
| 15 kJ | 9.3622636 × 10^22 |
| 20 kJ | 1.2483018 × 10^23 |
| 25 kJ | 1.5603773 × 10^23 |
| 30 kJ | 1.8724527 × 10^23 |
| 40 kJ | 2.4966036 × 10^23 |
| 50 kJ | 3.1207545 × 10^23 |
| 75 kJ | 4.6811318 × 10^23 |
| 100 kJ | 6.2415091 × 10^23 |
| 250 kJ | 1.5603773 × 10^24 |
| 500 kJ | 3.1207545 × 10^24 |
| 1,000 kJ | 6.2415091 × 10^24 |

## How the conversion works

The relationship is eV = kJ × 6.241509074 × 10^21. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

### How many electronvolts are in one kilojoule?

One kilojoule equals 6.2415091 × 10^21 electronvolts. eV = kJ × 6.241509074 × 10^21.

### How do you convert kilojoules to electronvolts?

Use eV = kJ × 6.241509074 × 10^21. So 10 kJ is 6.2415091 × 10^22 eV.

### How many kilojoules are in one electronvolt?

One electronvolt equals 1.602 × 10^-22 kilojoules, which is the reverse of the conversion above.

## Related pages

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