Kilojoules to Kilocalories converter (kJ to kcal)
Convert Kilojoules (kJ) to Kilocalories (kcal) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Kilojoules to Kilocalories
1 kilojoule (kJ) is equal to 0.239006 kilocalories (kcal).
E(kcal) = E(kJ) ÷ 4.184
Divide kilojoules by 4.184:
Example: Convert 10 kJ to kcal:
E(kcal) = 10 ÷ 4.184 = 2.39 kcal
What is a Kilojoules?
The Kilojoules (kJ) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Kilocalories?
The Kilocalories (kcal) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts energy from Kilojoules into Kilocalories. One kJ equals 0.239005736 kcal.
Kilojoules to Kilocalories conversion table
Common kJ values and the matching kcal result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 0 kJ | 0 kcal |
| 1 kJ | 0.239005736 kcal |
| 5 kJ | 1.195028681 kcal |
| 10 kJ | 2.390057361 kcal |
| 50 kJ | 11.950286805 kcal |
| 100 kJ | 23.90057361 kcal |
| 500 kJ | 119.50286805 kcal |
| 1000 kJ | 239.0057361 kcal |
How this calculator works
The form on this page is a Kilojoules-to-Kilocalories converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the kcal result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many kcal are in 1 kJ?
1 kJ = 0.239005736 kcal.
How do I convert Kilojoules to Kilocalories?
Divide kilojoules by 4.184:
Is this kJ to kcal converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.