Kilocalories to kilojoules converter
Kilojoules (kJ)
1 kilocalorie = 4.184 kilojoules
How to convert kilocalories to kilojoules
kJ = kcal × 4.184
Multiply the number of kilocalories by 4.184 to get kilojoules. Going the other way, divide by 4.184 (or multiply by 0.239005736138).
One kilocalorie is exactly defined as 4.184 kilojoules (to 12 significant figures), and one kilojoule is 0.239005736138 kilocalories.
Worked examples
- Convert 5 kilocalories: 5 × 4.184 = 20.92 20.92 kilojoules.
- Convert 12.5 kilocalories: 12.5 × 4.184 = 52.3 52.3 kilojoules.
- Convert 250 kilocalories: 250 × 4.184 = 1,046 1,046 kilojoules.
Quick-reference table
| kcal | kJ |
|---|---|
| 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 |
| 1,000 | 4,184 |
| kJ | kcal |
|---|---|
| 1 | 0.2390057361 |
| 2 | 0.4780114723 |
| 3 | 0.7170172084 |
| 5 | 1.195028681 |
| 10 | 2.390057361 |
| 15 | 3.585086042 |
| 20 | 4.780114723 |
| 25 | 5.975143403 |
| 50 | 11.95028681 |
| 75 | 17.92543021 |
| 100 | 23.90057361 |
| 1,000 | 239.0057361 |
Related conversions
Frequently asked questions
How many kilojoules are in 1 kilocalorie?
1 kilocalorie equals 4.184 kilojoules.
What is the formula to convert kilocalories to kilojoules?
Use kJ = kcal × 4.184. Multiply the number of kilocalories by 4.184 to get kilojoules. Going the other way, divide by 4.184 (or multiply by 0.239005736138).
What is 100 kilocalories in kilojoules?
100 kilocalories is 418.4 kilojoules.