Convert kilojoules to calories
Kilojoule (kJ) to calorie (cal). One kilojoule equals 239.01 calories.
Formula
Kilojoule to calorie conversion table
| Kilojoules | Calories | Calories | Kilojoules |
|---|---|---|---|
| 1 kJ | 239.01 cal | 1 cal | 0.004184 kJ |
| 2 kJ | 478.01 cal | 2 cal | 0.008368 kJ |
| 3 kJ | 717.02 cal | 3 cal | 0.012552 kJ |
| 5 kJ | 1195.03 cal | 5 cal | 0.02092 kJ |
| 10 kJ | 2390.06 cal | 10 cal | 0.04184 kJ |
| 20 kJ | 4780.11 cal | 20 cal | 0.08368 kJ |
| 50 kJ | 11950.29 cal | 50 cal | 0.2092 kJ |
| 100 kJ | 23900.57 cal | 100 cal | 0.4184 kJ |
| 500 kJ | 119502.87 cal | 500 cal | 2.092 kJ |
| 1000 kJ | 239005.74 cal | 1000 cal | 4.184 kJ |
To convert kilojoules to calories, multiply the number of kilojoules by 239.01. One kilojoule equals 239.01 calories, and one calorie equals 0.004184 kilojoules, so the relationship is fixed and exact. As a worked example, 10 kJ comes to 2390.06 cal. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a energy conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common kilojoule values already worked out in calories, plus the reverse calorie to kilojoule direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many calories are in a kilojoule?
One kilojoule equals 239.01 calories. The ratio is constant, so you can multiply any number of kilojoules by 239.01 to get calories.
What is the formula to convert kilojoules to calories?
Use calories = kilojoules × 239.01. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert calories back to kilojoules?
Go the other way by using one calorie equals 0.004184 kilojoules. You can also press the swap button in the converter above to flip the direction in one click.
Is this kilojoule to calorie converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.