Calories to Kilojoules
Convert kcal to kJ or kJ to kcal. Also shows calories (cal) and joules (J).
100% client-side · no upload
How to use
- Enter the energy value you want to convert.
- Click the button for your source unit: kcal, kJ, cal, or J.
- The result shows the energy in all four units simultaneously.
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Frequently Asked Questions
- Is this calories to kJ converter free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The converter is mobile-first and works on iPhone Safari and Android Chrome.
Last updated: By jarvisbox