Calories to Kilojoules Converter
1 calorie (cal) equals 0.004184 kilojoules (kJ).
Quick answer
- 1 calorie = 0.004184 kilojoules
- 1 kilojoule = 239.0057361 calories
- Formula: kJ = cal × 0.004184
1 calorie = 0.004184 kilojoules
How to convert calories to kilojoules
kJ = cal × 0.004184
To convert calories to kilojoules, multiply the number of calories by 0.004184.
Example: 42 cal to kJ
- Start with the value in calories: 42 cal.
- Multiply by 0.004184: 42 × 0.004184 = 0.175728.
- Result: 42 calories = 0.175728 kilojoules.
Going the other way, 1 kilojoule = 239.005736138 calories, so to convert kilojoules back to calories you divide by the same number. See kilojoules to calories.
Calories to kilojoules conversion table
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0.1 cal | 0.0004184 kJ |
| 0.2 cal | 0.0008368 kJ |
| 0.3 cal | 0.0012552 kJ |
| 0.4 cal | 0.0016736 kJ |
| 0.5 cal | 0.002092 kJ |
| 0.6 cal | 0.0025104 kJ |
| 0.7 cal | 0.0029288 kJ |
| 0.8 cal | 0.0033472 kJ |
| 0.9 cal | 0.0037656 kJ |
| 1 cal | 0.004184 kJ |
| 1.5 cal | 0.006276 kJ |
| 2 cal | 0.008368 kJ |
| 2.5 cal | 0.01046 kJ |
| 3 cal | 0.012552 kJ |
| 3.5 cal | 0.014644 kJ |
| 4 cal | 0.016736 kJ |
| 4.5 cal | 0.018828 kJ |
| 5 cal | 0.02092 kJ |
| 6 cal | 0.025104 kJ |
| 7 cal | 0.029288 kJ |
| 7.5 cal | 0.03138 kJ |
| 8 cal | 0.033472 kJ |
| 9 cal | 0.037656 kJ |
| 10 cal | 0.04184 kJ |
| 11 cal | 0.046024 kJ |
| 12 cal | 0.050208 kJ |
| 13 cal | 0.054392 kJ |
| 14 cal | 0.058576 kJ |
| 15 cal | 0.06276 kJ |
| 16 cal | 0.066944 kJ |
| 17 cal | 0.071128 kJ |
| 18 cal | 0.075312 kJ |
| 19 cal | 0.079496 kJ |
| 20 cal | 0.08368 kJ |
| 21 cal | 0.087864 kJ |
| 22 cal | 0.092048 kJ |
| 23 cal | 0.096232 kJ |
| 24 cal | 0.100416 kJ |
| 25 cal | 0.1046 kJ |
| 26 cal | 0.108784 kJ |
More cal to kJ values
- 27 cal
- 28 cal
- 29 cal
- 30 cal
- 31 cal
- 32 cal
- 33 cal
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- 35 cal
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- 10,000 cal
What is a calorie?
The calorie (small calorie) is the energy needed to raise the temperature of one gram of water by about one degree Celsius.
What is a kilojoule?
The kilojoule is 1,000 joules. It is the unit of food energy on labels in Australia, New Zealand and the EU (alongside kcal), and a common unit in chemistry.
Convert calories to other units
Convert other units to kilojoules
Frequently asked questions
How many kilojoules are in a calorie?
One calorie is 0.004184 kilojoules.
How many calories are in a kilojoule?
One kilojoule is 239.0057361 calories.
What is the formula to convert calories to kilojoules?
kJ = cal × 0.004184.