Free instant kcal → kJ converter. No signup, no uploads — everything is calculated privately in your browser.
1 kcal = 4.184 kilojoules
1 kilocalories = 4.184 kilojoules
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1 kilocalorie equals 4.184 kilojoules. To convert kilocalories to kilojoules, multiply the value by 4.184.
1 kilocalorie = 4.184 kilojoules. Formula: value × 4.184
Example: 1 kcal → 4.184 kJ. Type any value in the converter above to see it converted live.
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 25 kcal | 104.6 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 250 kcal | 1,046 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
1 kilocalorie = 4.184 kilojoules. Formula: value × 4.184. Enter the value above and the result appears instantly — the calculation runs entirely in your browser.
Exactly: 1 kilocalorie = 4.184 kilojoules. The reverse factor is 1 kilojoule = 0.2390057361376673 kilocalories.
1 kcal = 4.184 kJ; 10 kcal = 41.84 kJ; 100 kcal = 418.4 kJ. Use the full conversion table below for more reference values.
No — and the capital letter matters. A food Calorie (with a capital C) is a kilocalorie: 1,000 small calories. This converter treats them correctly: 1 kcal = 4.184 kJ = 1,000 cal. Energy labels on food almost always mean kilocalories, even where the label just says "calories".