Convert kcal to kJ instantly — formula, worked examples and a conversion table of common values.
Convert kilocalories (kcal) to kilojoules (kJ). Enter a value on either side and the other updates instantly — nothing is sent to a server.
One kilocalorie equals 4.184 kJ. The table below lists the values people look up most often, and each one links to a page with the worked calculation.
kJ = kcal × 4.184| Kilocalorie (food Calorie) (kcal) | Kilojoule (kJ) |
|---|---|
| 0.1 | 0.4184 |
| 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 | 1,046 |
| 500 | 2,092 |
| 1,000 | 4,184 |
1 kilocalorie = 4.184 kJ.
10 kcal = 41.84 kJ.
100 kcal = 418.4 kJ.
Use the formula kJ = kcal × 4.184. Or type any value into the converter above — it works in both directions.