⚡ Energy
kilocalories (kcal) to kilojoules Converter
Convert kilocalories (kcal) to kilojoules instantly with a reference conversion table.
Quick answer: To convert kilocalories (kcal) to kilojoules, multiply by 4.184. For example, 1 kilocalories (kcal) = 4.184 kilojoules. Use the calculator below for any value.
kilocalories (kcal) to kilojoules
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Common conversions
| kilocalories (kcal) | kilojoules |
|---|
Formula:
How to convert kilocalories (kcal) to kilojoules
1
Enter your value
Type the number of kilocalories (kcal) you want to convert into the left box. The result in kilojoules appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — kilojoules to kilocalories (kcal). Your current value carries across so you don't have to re-enter anything.
3
About kilocalories (kcal) and kilojoules
kilocalories (kcal) and kilojoules are common energy measurements.
📊 Common conversions at a glance
| kilocalories (kcal) | kilojoules |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 50 | 209.2 |
| 100 | 418.4 |
Reviewed for 2026. kilocalories (kcal) ↔ kilojoules conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.