Kilocalories to Kilojoules Converter
Convert kilocalories (kcal) to kilojoules (kJ) instantly. 1 kilocalorie = 4.184 kilojoules.
How to convert kilocalories to kilojoules
kJ = kcal × 4.184
To convert kilocalories to kilojoules, multiply the energy value by 4.184. One kilocalorie (kcal) is equal to 4.184 kilojoules (kJ). For quick everyday conversions, the interactive converter above gives you the exact result as you type — no rounding surprises.
Kilocalories to Kilojoules conversion table
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 3 kcal | 12.552 kJ |
| 4 kcal | 16.736 kJ |
| 5 kcal | 20.92 kJ |
| 6 kcal | 25.104 kJ |
| 7 kcal | 29.288 kJ |
| 8 kcal | 33.472 kJ |
| 9 kcal | 37.656 kJ |
| 10 kcal | 41.84 kJ |
| 15 kcal | 62.76 kJ |
| 20 kcal | 83.68 kJ |
| 25 kcal | 104.6 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
Frequently asked questions
How many kilojoules are in 1 kilocalorie?
1 kilocalorie equals 4.184 kilojoules.
How do I convert kilocalories to kilojoules?
Multiply the number of kilocalories by 4.184. For example, 8 kcal × 4.184 = 33.472 kJ.
What is 8 kilocalories in kilojoules?
8 kilocalories is equal to 33.472 kilojoules.
Can I convert kilojoules back to kilocalories?
Yes — use our Kilojoules to Kilocalories converter, or divide by 4.184.