cal to kJ
Convert Calorie to Kilojoule
Convert Calorie to Kilojoule instantly with the tool above. The conversion factor is 0.004184, meaning 1 calorie equals 0.004184 kilojoules. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Calorie = 0.004184 kilojoules
1 Kilojoule = 239.00573614 calories
Quick reference
Common calories converted to kilojoules at a glance.
| cal | kJ |
|---|---|
| 1 | 0.004184 |
| 2 | 0.008368 |
| 5 | 0.02092 |
| 10 | 0.04184 |
| 25 | 0.1046 |
| 50 | 0.2092 |
| 100 | 0.4184 |
| 500 | 2.092 |
| 1,000 | 4.184 |
How to convert calories to kilojoules
To convert a value from calories to kilojoules, multiply the calorie value by 0.004184 kilojoules. For example, 10 calories × that factor = 0.04184 kilojoules.
This calorie to kilojoule converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many kilojoules are in 1 calorie?+
1 calorie is equal to 0.004184 kilojoules.
How do you convert calories to kilojoules?+
To convert calories to kilojoules, multiply the calorie value by 0.004184. For example, 10 calories × 0.004184 = 0.04184 kilojoules.
What is the formula to convert calories to kilojoules?+
Calorie → Kilojoule: value × 0.004184. Equivalently, 1 calorie = 0.004184 kilojoules.
Is this Calorie to Kilojoule converter free to use?+
Yes. This calorie to kilojoule converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.