Instantly convert kilocalories (kcal) to kilojoules (kJ). Bidirectional, accurate, and free.
To convert kilocalories to kilojoules, use the formula kilojoules = kilocalories × 4.184. For example, 2 kilocalories equals 8.368 kilojoules. Type any number into the calculator above and the result appears instantly — you can also type into the kilojoules box to convert the other way.
| Kilocalories | Kilojoules |
|---|---|
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 150 kcal | 627.6 kJ |
| 200 kcal | 836.8 kJ |
| 250 kcal | 1,046 kJ |
| 300 kcal | 1,255.2 kJ |
| 400 kcal | 1,673.6 kJ |
| 500 kcal | 2,092 kJ |
There are 4.184 kilojoules in one kilocalorie. To convert any value, apply the formula kilojoules = kilocalories × 4.184.
The formula is kilojoules = kilocalories × 4.184. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.