Calories to Kilojoules
Convert calories (cal) to kilojoules (kJ). Type in either box; the other updates as you go.
How to convert calories to kilojoules
To convert calories to kilojoules, multiply the number of calories by 0.004184.
Example
Convert 5 calories to kilojoules:
Calorie to kilojoule conversion chart
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 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 |
| 12 cal | 0.050208 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 |
| 60 cal | 0.25104 kJ |
| 70 cal | 0.29288 kJ |
| 75 cal | 0.3138 kJ |
| 80 cal | 0.33472 kJ |
| 90 cal | 0.37656 kJ |
| 100 cal | 0.4184 kJ |
| 150 cal | 0.6276 kJ |
| 200 cal | 0.8368 kJ |
| 250 cal | 1.046 kJ |
| 500 cal | 2.092 kJ |
| 1,000 cal | 4.184 kJ |
Going the other way? See the kilojoules to calories chart.
About the units
Calorie (cal)
A small calorie (thermochemical) is exactly 4.184 joules, the energy to warm one gram of water by about one degree Celsius.
Kilojoule (kJ)
A kilojoule is 1,000 joules. Food labels in Australia and Europe give energy in kJ next to kcal.
Frequently asked questions
How many kilojoules are in a calorie?
There are 0.004184 kilojoules in a calorie.
How many calories are in a kilojoule?
There are 239.0057361 calories in a kilojoule.
How do you convert calories to kilojoules?
To convert calories to kilojoules, multiply the number of calories by 0.004184.
What is 5 calories in kilojoules?
5 calories equals 0.02092 kilojoules.
Convert between joules, calories, kilocalories, kilowatt-hours and BTU. Open the energy converter to see a value in every unit at once.