Convert kilocalories to kilojoules and kJ to kcal instantly. Bidirectional energy converter with formula and common values.
Multiply the kilocalorie value by 4.184 to get kilojoules. This is the standard conversion used on food nutrition labels internationally.
| Kilocalories | Kilojoules |
|---|---|
| 50 | 209.2 |
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 750 | 3,138 |
| 1,000 | 4,184 |
| 2,000 | 8,368 |
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One kilocalorie equals exactly 4.184 kilojoules. This is the most common conversion seen on food labels worldwide.
Multiply the kcal value by 4.184. For example, 350 kcal × 4.184 = 1,464.4 kJ.
International food labeling standards require kilojoules (the SI-derived unit), while consumers in many countries are more familiar with kilocalories. Showing both helps global readability.
The commonly cited 2,000 kcal daily intake equals about 8,368 kJ. Individual needs vary based on age, sex, weight, and activity level.