Convert Calories to Kilojoules
1 calorie = 0.004184 kilojoules. Type any value below to convert in either direction — the calculation happens in your browser.
Calories to Kilojoules formula
Multiply the number of calories by 0.004184 to get kilojoules.
kilojoules = calories × 0.004184To go the other way: divide the number of kilojoules by 0.004184, or multiply by 239.005736.
calories = kilojoules ÷ 0.004184Calories to Kilojoules conversion table
| Calories | Kilojoules |
|---|---|
| 1 cal | 0.004184 kJ |
| 2 cal | 0.008368 kJ |
| 3 cal | 0.012552 kJ |
| 4 cal | 0.016736 kJ |
| 5 cal | 0.02092 kJ |
| 6 cal | 0.025104 kJ |
| 7 cal | 0.029288 kJ |
| 8 cal | 0.033472 kJ |
| 9 cal | 0.037656 kJ |
| 10 cal | 0.04184 kJ |
| 15 cal | 0.06276 kJ |
| 20 cal | 0.08368 kJ |
| 25 cal | 0.1046 kJ |
| 30 cal | 0.12552 kJ |
| 40 cal | 0.16736 kJ |
| 50 cal | 0.2092 kJ |
| 75 cal | 0.3138 kJ |
| 100 cal | 0.4184 kJ |
| 250 cal | 1.046 kJ |
| 500 cal | 2.092 kJ |
| 1,000 cal | 4.184 kJ |
Kilojoules to Calories conversion table
| Kilojoules | Calories |
|---|---|
| 1 kJ | 239.005736 cal |
| 2 kJ | 478.011472 cal |
| 3 kJ | 717.017208 cal |
| 4 kJ | 956.022945 cal |
| 5 kJ | 1,195.029 cal |
| 6 kJ | 1,434.034 cal |
| 7 kJ | 1,673.04 cal |
| 8 kJ | 1,912.046 cal |
| 9 kJ | 2,151.052 cal |
| 10 kJ | 2,390.057 cal |
About the calorie
A thermochemical calorie is exactly 4.184 joules — the energy to heat one gram of water by one degree Celsius.
About the kilojoule
A kilojoule is 1,000 joules and is how food energy is labelled in most of the world.
Frequently asked questions
How many kilojoules are in a calorie?
There are 0.004184 kilojoules in one calorie.
How many calories are in a kilojoule?
There are 239.005736 calories in one kilojoule.
Is this conversion exact?
The ratio between the calorie and the kilojoule is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 calories in kilojoules?
10 calories equals 0.04184 kilojoules.
Related energy conversions
- Joules to Kilojoules
- Calories to Joules
- Calories to Kilocalories
- Calories to Watt Hours
- Calories to Kilowatt Hours
- Calories to British Thermal Units
- Calories to Electronvolts
- Calories to Foot Pounds
- Kilocalories to Kilojoules
- Watt Hours to Kilojoules
- Kilowatt Hours to Kilojoules
- British Thermal Units to Kilojoules
- Electronvolts to Kilojoules
- Foot Pounds to Kilojoules