How to convert Kilocalories to Kilojoules
To convert kilocalories to kilojoules, multiply by 4.184. For example, 5 kcal × 4.184 = 20.92 kj.
Kilocalories to Kilojoules conversion table
| Kilocalories (kcal) | Kilojoules (kj) |
|---|---|
| 0.25 | 1.046 |
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 5 | 20.92 |
| 10 | 41.84 |
| 15 | 62.76 |
| 20 | 83.68 |
| 25 | 104.6 |
| 50 | 209.2 |
| 75 | 313.8 |
| 100 | 418.4 |
| 250 | 1046 |
| 500 | 2092 |
| 1000 | 4184 |
About the units
Kilocalories (kcal) — the “Calorie” on food labels, equal to 4.184 kilojoules.
Kilojoules (kj) — a metric unit of energy used on food labels in Europe and Australia.
Frequently asked questions
How many kilojoules are in one kilocalorie?
One kilocalorie equals 4.184 kilojoules.
What is the formula to convert kilocalories to kilojoules?
Multiply the value in kilocalories by 4.184. For example, 10 kcal × 4.184 = 41.84 kj.
How do I convert kilojoules back to kilocalories?
Divide by 4.184 — or multiply by 0.23900574. You can also type directly in the second box of the converter above.
Is this converter accurate?
Yes. It uses the internationally defined conversion factors (for example, 1 inch = 2.54 cm exactly and 1 pound = 0.45359237 kg exactly) and shows up to 10 significant digits.
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