---
title: "Electronvolts to Kilocalories — eV to kcal converter"
description: "1 electronvolt = 3.829 × 10^-23 kilocalories. Convert electronvolts to kilocalories with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/electronvolts-to-kcal/
site: "At One Place"
---

# Electronvolts to kilocalories

**1 electronvolt in kilocalories: 1 eV = 3.829 × 10^-23 kcal**

kcal = eV × 3.829294058 × 10^-23

To convert electronvolts to kilocalories, multiply by 3.829294058 × 10^-23. The table below gives the values people look up most often, and the converter works for any number.

## Electronvolts to kilocalories table

*Common electronvolt values converted to kilocalories.*

| Electronvolts | Kilocalories |
| --- | --- |
| 1 eV | 3.829 × 10^-23 |
| 2 eV | 7.659 × 10^-23 |
| 3 eV | 1.149 × 10^-22 |
| 4 eV | 1.532 × 10^-22 |
| 5 eV | 1.915 × 10^-22 |
| 10 eV | 3.829 × 10^-22 |
| 15 eV | 5.744 × 10^-22 |
| 20 eV | 7.659 × 10^-22 |
| 25 eV | 9.573 × 10^-22 |
| 30 eV | 1.149 × 10^-21 |
| 40 eV | 1.532 × 10^-21 |
| 50 eV | 1.915 × 10^-21 |
| 75 eV | 2.872 × 10^-21 |
| 100 eV | 3.829 × 10^-21 |
| 250 eV | 9.573 × 10^-21 |
| 500 eV | 1.915 × 10^-20 |
| 1,000 eV | 3.829 × 10^-20 |

## How the conversion works

The relationship is kcal = eV × 3.829294058 × 10^-23. Both units measure energy, so the conversion is a fixed factor that never changes.

> Kilocalorie: The "calorie" on food labels.

## Common questions

### How many kilocalories are in one electronvolt?

One electronvolt equals 3.829 × 10^-23 kilocalories. kcal = eV × 3.829294058 × 10^-23.

### How do you convert electronvolts to kilocalories?

Use kcal = eV × 3.829294058 × 10^-23. So 10 eV is 3.829 × 10^-22 kcal.

### How many electronvolts are in one kilocalorie?

One kilocalorie equals 2.6114474 × 10^22 electronvolts, which is the reverse of the conversion above.

### Is there more than one kind of kilocalorie?

The "calorie" on food labels.

## Related pages

- [Kilocalories to Electronvolts](https://atoneplace.net/convert/kcal-to-electronvolts/)
- [Electronvolts to Joules](https://atoneplace.net/convert/electronvolts-to-joules/)
- [Electronvolts to Kilojoules](https://atoneplace.net/convert/electronvolts-to-kilojoules/)
- [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/)