Convert Kilojoule to Calorie
Use this free converter to change kilojoules (kJ) into calories (cal). Kilojoule and calorie both measure energy. As a quick reference, 1 kJ equals 239.00574 cal, and 1 cal equals 0.004184 kJ.
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Calorie (cal)
239.00574
1 kJ = 239.00574 cal
Energy conversion table
| Kilojoule | Calorie |
|---|---|
| 0.01 | 2.3900574 |
| 0.1 | 23.900574 |
| 0.5 | 119.50287 |
| 1 | 239.00574 |
| 2 | 478.01147 |
| 3 | 717.01721 |
| 5 | 1195.0287 |
| 10 | 2390.0574 |
| 20 | 4780.1147 |
| 25 | 5975.1434 |
| 50 | 11950.287 |
| 100 | 23900.574 |
| 1,000 | 239005.74 |
How to convert Kilojoule to Calorie
Multiply the kilojoule value by 239.00574 to get calories.
- Enter the number of kilojoules you want to convert.
- The converter instantly shows the equivalent value in calories.
- Worked example: 15 kJ × 239.00574 = 3585.086 cal.
- Use the swap button to reverse the conversion (calorie to kilojoule).
About these units
Kilojoule (kJ)
- Definition
- A kilojoule (kJ) is 1,000 joules, a practical size for food energy and mechanical work.
- History
- It is a metric multiple of the joule.
- Current use
- Kilojoules express food energy on nutrition labels in many countries.
Calorie (cal)
- Definition
- A calorie (cal) is the energy needed to raise one gram of water by one degree Celsius, about 4.184 joules.
- History
- Defined in the 19th century, the small calorie was later joined by the larger food Calorie.
- Current use
- Calories appear in chemistry and, as kilocalories, in nutrition.
Frequently asked questions
How many calories are in a kilojoule?
There are 239.00574 cal in 1 kJ. To convert, multiply the number of kilojoules by 239.00574.
How do I convert kilojoules to calories?
Multiply the kilojoule value by 239.00574 to get calories. For example, 10 kJ = 2390.0574 cal.
Is this kilojoule-to-calorie converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Kilojoule to other energy units
| Unit | 1 Kilojoule equals |
|---|---|
| Joule (J) | 1000 J |
| Calorie (cal) | 239.00574 cal |
| Kilocalorie (kcal) | 0.23900574 kcal |
| Watt Hour (Wh) | 0.27777778 Wh |
| Kilowatt Hour (kWh) | 0.00027777778 kWh |
| Electronvolt (eV) | 6.2415e+21 eV |
| British Thermal Unit (BTU) | 0.94781712 BTU |
| Foot-Pound (ft·lb) | 737.56215 ft·lb |