---
title: "Kilocalories to Kilojoules — kcal to kJ converter"
description: "1 kilocalorie = 4.184 kilojoules. Convert kilocalories to kilojoules with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/kcal-to-kilojoules/
site: "At One Place"
---

# Kilocalories to kilojoules

**1 kilocalorie in kilojoules: 1 kcal = 4.184 kJ**

kJ = kcal × 4.184

To convert kilocalories to kilojoules, multiply by 4.184. The table below gives the values people look up most often, and the converter works for any number.

## Kilocalories to kilojoules table

*Common kilocalorie values converted to kilojoules.*

| Kilocalories | Kilojoules |
| --- | --- |
| 1 kcal | 4.184 |
| 2 kcal | 8.368 |
| 3 kcal | 12.552 |
| 4 kcal | 16.736 |
| 5 kcal | 20.92 |
| 10 kcal | 41.84 |
| 15 kcal | 62.76 |
| 20 kcal | 83.68 |
| 25 kcal | 104.6 |
| 30 kcal | 125.52 |
| 40 kcal | 167.36 |
| 50 kcal | 209.2 |
| 75 kcal | 313.8 |
| 100 kcal | 418.4 |
| 250 kcal | 1,046 |
| 500 kcal | 2,092 |
| 1,000 kcal | 4,184 |

## How the conversion works

The relationship is kJ = kcal × 4.184. Both units measure energy, so the conversion is a fixed factor that never changes.

> Kilocalorie: The "calorie" on food labels.

## Common questions

### How many kilojoules are in one kilocalorie?

One kilocalorie equals 4.184 kilojoules. kJ = kcal × 4.184.

### How do you convert kilocalories to kilojoules?

Use kJ = kcal × 4.184. So 10 kcal is 41.84 kJ.

### How many kilocalories are in one kilojoule?

One kilojoule equals 0.23901 kilocalories, which is the reverse of the conversion above.

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

The "calorie" on food labels.

## Related pages

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