Kilojoules to Kilocalories Converter
Convert kilojoules (kJ) to kilocalories (kcal) instantly. Type a value above and the result updates while you type. 1 kilojoule equals 0.239006 kilocalories.
Result updates as you type. Values are calculated locally in your browser — nothing is sent to a server.
The formula
1 kilojoule = 0.239006 kilocalories
Multiply the kilojoules value by 0.239006 to get kilocalories. Or divide by 4.184 to go the other way.
Kilojoules to kilocalories conversion table
| kJ | kcal |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 4 | 0.956023 |
| 5 | 1.19503 |
| 6 | 1.43403 |
| 7 | 1.67304 |
| 8 | 1.91205 |
| 9 | 2.15105 |
| 10 | 2.39006 |
| 15 | 3.58509 |
| 20 | 4.78011 |
| 25 | 5.97514 |
| 50 | 11.9503 |
| 75 | 17.9254 |
| 100 | 23.9006 |
Worked examples
- 5 kJ × 0.239006 = 1.19503 kcal
- 30 kJ × 0.239006 = 7.17017 kcal
- 165 kJ × 0.239006 = 39.4359 kcal
Conversion factors follow the exact international definitions (SI/BIPM; imperial units per the 1959 International Yard and Pound Agreement, maintained by NIST). NIST unit conversion reference
Factors last verified August 2026 · Built by Jeffrey Tepper.
Looking for the other direction?
Frequently asked questions
How many kilocalories are in 1 kilojoule?
1 kilojoule equals 0.239006 kilocalories (kJ → kcal).
How do you convert kilojoules to kilocalories?
Multiply the number of kilojoules by 0.239006. For example: 10 kJ × 0.239006 = 2.39006 kcal.
What is 50 kJ in kcal?
50 kJ equals 11.9503 kcal.
Which is bigger: 1 kilojoule or 1 kilocalorie?
1 kilocalorie is bigger: 1 kilojoule is only 0.239006 kilocalories.