How to convert kilojoules to kilocalories
To convert kilojoules to kilocalories, multiply the value by the conversion factor 0.2390057361. To go the other way, multiply by 4.184 (or divide by 0.2390057361).
Worked example: 25 kJ to kcal
- Write the value: 25 kJ
- Multiply by 0.2390057361: 25 × 0.2390057361
- Result: 5.97514 kcal
Kilojoule to Kilocalorie conversion table
Quick reference values, rounded to 6 significant digits.
| Kilojoule (kJ) | Kilocalorie (kcal) |
|---|---|
| 0.1 kJ | 0.0239006 kcal |
| 0.25 kJ | 0.0597514 kcal |
| 0.5 kJ | 0.119503 kcal |
| 1 kJ | 0.239006 kcal |
| 2 kJ | 0.478011 kcal |
| 3 kJ | 0.717017 kcal |
| 4 kJ | 0.956023 kcal |
| 5 kJ | 1.19503 kcal |
| 6 kJ | 1.43403 kcal |
| 7 kJ | 1.67304 kcal |
| 8 kJ | 1.91205 kcal |
| 9 kJ | 2.15105 kcal |
| 10 kJ | 2.39006 kcal |
| 12 kJ | 2.86807 kcal |
| 15 kJ | 3.58509 kcal |
| 20 kJ | 4.78011 kcal |
| 25 kJ | 5.97514 kcal |
| 30 kJ | 7.17017 kcal |
| 40 kJ | 9.56023 kcal |
| 50 kJ | 11.9503 kcal |
| 75 kJ | 17.9254 kcal |
| 100 kJ | 23.9006 kcal |
| 250 kJ | 59.7514 kcal |
| 500 kJ | 119.503 kcal |
| 1,000 kJ | 239.006 kcal |
Kilocalorie to Kilojoule
| kcal | kJ |
|---|---|
| 1 kcal | 4.184 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
1 Kilojoule in other energy units
About Kilojoule and Kilocalorie
What is a kilojoule (kJ)?
A kilojoule equals 1,000 joules, used on food labels.
What is a kilocalorie (kcal)?
A kilocalorie (food Calorie) equals 1,000 calories, used for diet and nutrition.
Where kilojoule to kilocalorie conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between kilojoules and kilocalories is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Energy Converter.
Frequently asked questions
How many kilocalories are in 1 kilojoule?
1 Kilojoule equals 0.239006 kcal.
How do I convert kilojoules to kilocalories?
Multiply the number of kilojoules by 0.2390057361. For example, 25 kJ × 0.2390057361 = 5.97514 kcal.
What is 25 kJ in kcal?
25 kJ = 5.97514 kcal.
How many kilojoules are in 1 kilocalorie?
1 Kilocalorie equals 4.184 kJ. Use the Kcal to kJ converter for the reverse direction.
Is this Kilojoule to Kilocalorie converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.