Convert Kilojoule to Kilocalorie
Live bidirectional calculator for Kilojoules (kJ) and Kilocalories (kcal) with verified formula and conversion charts.
Energy9 units
How the Calculation Works (Linear Scaling)
Since 1 Kilocalorie = 4.184 Kilojoules, divide the value in Kilojoules by 4.184.
Kilojoule to Kilocalorie Conversion Table
Precomputed values for quick reference and printing.
| Kilojoule | Kilocalorie |
|---|---|
| 1 kJ | 0.239 kcal |
| 2 kJ | 0.478 kcal |
| 3 kJ | 0.717 kcal |
| 4 kJ | 0.956 kcal |
| 5 kJ | 1.195 kcal |
| 6 kJ | 1.434 kcal |
| 7 kJ | 1.673 kcal |
| 8 kJ | 1.912 kcal |
| 9 kJ | 2.1511 kcal |
| 10 kJ | 2.3901 kcal |
| 15 kJ | 3.5851 kcal |
| 20 kJ | 4.7801 kcal |
| 25 kJ | 5.9751 kcal |
| 30 kJ | 7.1702 kcal |
| 40 kJ | 9.5602 kcal |
| 50 kJ | 11.9503 kcal |
| 75 kJ | 17.9254 kcal |
| 100 kJ | 23.9006 kcal |
| Kilocalorie | Kilojoule |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 3 kcal | 12.552 kJ |
| 4 kcal | 16.736 kJ |
| 5 kcal | 20.92 kJ |
| 6 kcal | 25.104 kJ |
| 7 kcal | 29.288 kJ |
| 8 kcal | 33.472 kJ |
| 9 kcal | 37.656 kJ |
| 10 kcal | 41.84 kJ |
| 15 kcal | 62.76 kJ |
| 20 kcal | 83.68 kJ |
| 25 kcal | 104.6 kJ |
| 30 kcal | 125.52 kJ |
| 40 kcal | 167.36 kJ |
| 50 kcal | 209.2 kJ |
| 75 kcal | 313.8 kJ |
| 100 kcal | 418.4 kJ |
About Kilojoule (kJ)
One thousand joules (10Β³ J).
History: Standard metric energy multiple widely used on international food nutrition labels.
Common Uses: Nutritional energy labeling worldwide, chemical enthalpy reactions.
About Kilocalorie (kcal)
One thousand thermochemical calories, equal to exactly 4,184 joules (the standard "food Calorie" capitalized as Cal).
History: Introduced by Nicolas ClΓ©ment in 1824 and later popularized for dietary nutrition accounting.
Common Uses: Dietary intake tracking, food packaging calories in the US, exercise burn rates.
β Frequently Asked Questions
How many Kilocalories are in 1 Kilojoule?
There are exactly 0.239006 Kilocalories in 1 Kilojoule (1 kJ = 0.239006 kcal).
What is the formula to convert Kilojoule to Kilocalorie?
The formula is: Kilocalorie = Kilojoule / 4.184. Since 1 Kilocalorie = 4.184 Kilojoules, divide the value in Kilojoules by 4.184.
How do I convert 1 kJ to kcal manually?
To convert 1 kJ to kcal: apply the formula Kilocalorie = Kilojoule / 4.184. Substituting gives: 1 / 4.184 = 0.239 kcal.