Unit Converter
Calories to Kilojoules Converter
Convert calories (cal) to kilojoules (kJ) instantly. Free, accurate, and browser-based — no signup, no ads in your way.
How to convert calories to kilojoules
1 cal = 0.004184 kJ. Multiply the calories value by 0.004184 to get kilojoules.
Example: 25 cal = 25 × 0.004184 = 0.1046 kJ.
Calories to kilojoules conversion table
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 1 | 0.004184 |
| 2 | 0.008368 |
| 3 | 0.012552 |
| 4 | 0.016736 |
| 5 | 0.02092 |
| 6 | 0.025104 |
| 7 | 0.029288 |
| 8 | 0.033472 |
| 9 | 0.037656 |
| 10 | 0.04184 |
| 15 | 0.06276 |
| 20 | 0.08368 |
| 25 | 0.1046 |
| 30 | 0.12552 |
| 40 | 0.16736 |
| 50 | 0.2092 |
| 75 | 0.3138 |
| 100 | 0.4184 |
| 250 | 1.046 |
| 500 | 2.092 |
Convert the other way
Need kJ to cal instead? Use the dedicated Kilojoules to Calories converter.
FAQ
How do I convert calories to kilojoules?
1 cal = 0.004184 kJ. Multiply the calories value by 0.004184 to get kilojoules.
How many kilojoules are in one calorie?
One calorie (cal) equals 0.004184 kilojoules (kJ).
What is 10 cal in kJ?
10 calories equals 0.04184 kilojoules. Type any value into the converter above for an instant exact result.
Is this cal to kJ converter free?
Yes. Every Utiliora tool is free, open source, works in your browser, and never asks you to sign up.
Can I convert the other way, from kJ to cal?
Yes — use the Kilojoules to Calories converter at /converters/kilojoules-to-calories, or press the swap button in the converter above.