Convert Kilocalories to Kilojoules
Kilocalories to Kilojoules conversion table
| 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 |
| 200 kcal | 836.8 kJ |
| 500 kcal | 2092 kJ |
| 1000 kcal | 4184 kJ |
How to convert kilocalories to kilojoules
Kilocalories and kilojoules both appear on food nutrition labels — kcal in the US and UK, kJ in Australia, Europe, and Canada. One kilocalorie (food Calorie) equals 4.184 kilojoules.
Multiply kcal by 4.184 to get kJ. Formula: kJ = kcal × 4.184. 100 kcal = 418.4 kJ. A 2,000 kcal daily diet = 8,368 kJ. A 250 kcal snack = 1,046 kJ.
Comparing international food labels, diet planning across regions, and exercise energy expenditure (burned calories vs kilojoules) require this conversion.
Quick values: 200 kcal ≈ 837 kJ, 500 kcal ≈ 2,092 kJ. Divide kJ by 4.184 to get kcal.
Related conversions
Frequently asked questions
1 kcal = 4.184 kJ.
Divide kJ by 4.184 to get kcal. Example: 2,100 kJ ÷ 4.184 = 502 kcal.
8,368 kJ ÷ 4.184 = 2,000 kcal, a standard daily intake reference.