⚡ Energy
kcal (food) to kJ Converter
Convert kcal (food) to kJ instantly with a reference conversion table.
Quick answer: To convert kcal (food) to kJ, multiply by 4.184. For example, 1 kcal (food) = 4.184 kJ. Use the calculator below for any value.
kcal (food) to kJ
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Common conversions
| kcal (food) | kJ |
|---|
Formula:
How to convert kcal (food) to kJ
1
Enter your value
Type the number of kcal (food) you want to convert into the left box. The result in kj 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 — kJ to kcal (food). Your current value carries across so you don't have to re-enter anything.
3
About kcal (food) and kJ
kcal (food) and kJ are common energy measurements.
💡 Did you know?
1 kcal = 4.184 kJ exactly. The EU requires kJ as the primary food energy unit; UK uses kcal as primary. Australian and New Zealand labels show kJ first. The 'Calorie' on a US label (capital C) = 1 kcal = 4.184 kJ. A 2,000 Calorie diet = 8,368 kJ.
📊 Common conversions at a glance
| kcal (food) | kJ |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 50 | 209.2 |
| 100 | 418.4 |
Reviewed for 2026. kcal (food) ↔ kJ 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.