Convert Kilojoules to Kilocalories
kJ to kcal · energy conversion
What are kilojoules and kilocalories?
A kilojoule is 1,000 joules, used for food energy outside the US. A kilocalorie (the food Calorie) is 1,000 small calories, the unit on US nutrition labels. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert kilojoules to kilocalories
1 kJ = 0.239006 kcal. To convert, multiply the number of kilojoules by 0.239006. For example, 5 kJ = 1.19503 kcal, and 20 kJ = 4.78011 kcal. To go the other way, multiply kilocalories by 4.184 (since 1 kcal = 4.184 kJ).
Kilojoules to Kilocalories conversion table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 | 0.239006 |
| 10 | 2.39006 |
| 100 | 23.9006 |
| 500 | 119.503 |
| 1,000 | 239.006 |
| 2,000 | 478.011 |
| 5,000 | 1,195.03 |
FAQ
What is 1 kJ in kcal?
1 kJ = 0.239006 kcal. To convert any amount, multiply the number of kilojoules by 0.239006.
How do I convert kilocalories back to kilojoules?
Go the other way: 1 kcal = 4.184 kJ, so multiply kilocalories by 4.184 to get kilojoules.
Is a kilojoule bigger than a kilocalorie?
No — 1 kJ is the smaller unit, equal to 0.239006 kcal (it takes 4.184 kJ to make one kcal).
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.