How to convert kilojoules to calories
To convert kilojoules to calories, multiply the value by the conversion factor 239.0057361. To go the other way, multiply by 0.004184 (or divide by 239.0057361).
Worked example: 25 kJ to cal
- Write the value: 25 kJ
- Multiply by 239.0057361: 25 × 239.0057361
- Result: 5,975.14 cal
Kilojoule to Calorie conversion table
Quick reference values, rounded to 6 significant digits.
| Kilojoule (kJ) | Calorie (cal) |
|---|---|
| 0.1 kJ | 23.9006 cal |
| 0.25 kJ | 59.7514 cal |
| 0.5 kJ | 119.503 cal |
| 1 kJ | 239.006 cal |
| 2 kJ | 478.011 cal |
| 3 kJ | 717.017 cal |
| 4 kJ | 956.023 cal |
| 5 kJ | 1,195.03 cal |
| 6 kJ | 1,434.03 cal |
| 7 kJ | 1,673.04 cal |
| 8 kJ | 1,912.05 cal |
| 9 kJ | 2,151.05 cal |
| 10 kJ | 2,390.06 cal |
| 12 kJ | 2,868.07 cal |
| 15 kJ | 3,585.09 cal |
| 20 kJ | 4,780.11 cal |
| 25 kJ | 5,975.14 cal |
| 30 kJ | 7,170.17 cal |
| 40 kJ | 9,560.23 cal |
| 50 kJ | 11,950.29 cal |
| 75 kJ | 17,925.43 cal |
| 100 kJ | 23,900.57 cal |
| 250 kJ | 59,751.43 cal |
| 500 kJ | 119,503 cal |
| 1,000 kJ | 239,006 cal |
Calorie to Kilojoule
| cal | kJ |
|---|---|
| 1 cal | 0.004184 kJ |
| 5 cal | 0.02092 kJ |
| 10 cal | 0.04184 kJ |
| 50 cal | 0.2092 kJ |
| 100 cal | 0.4184 kJ |
1 Kilojoule in other energy units
About Kilojoule and Calorie
What is a kilojoule (kJ)?
A kilojoule equals 1,000 joules, used on food labels.
What is a calorie (cal)?
A small calorie is the energy to raise 1 g of water by 1 °C (4.184 J).
Where kilojoule to calorie conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between kilojoules and calories 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 calories are in 1 kilojoule?
1 Kilojoule equals 239.006 cal.
How do I convert kilojoules to calories?
Multiply the number of kilojoules by 239.0057361. For example, 25 kJ × 239.0057361 = 5,975.14 cal.
What is 25 kJ in cal?
25 kJ = 5,975.14 cal.
How many kilojoules are in 1 calorie?
1 Calorie equals 0.004184 kJ. Use the Calories to kJ converter for the reverse direction.
Is this Kilojoule to Calorie converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.