Convert kilojoules to calories or calories to kilojoules using this calculator tool and chart.
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How to convert kilojoules to calories
There are 4.184kJ in 1 food calorie (kcal). To roughly convert kilojoules to calories, divide your kJ figure by 4.2 or multiply it by 0.24. Note that when we talk about calories, we are actually describing food calories (kilocalories).
As an example, let's say you're pouring yourself a glass of orange juice which supplies 400kJ of energy, and you want to convert it into calories. To do so, you divide it by 4.184, which gives you a figure of around 96 calories.
How to convert calories to kilojoules
As there are 4.184kJ in 1 food calorie (kcal), you can roughly convert calories to kilojoules by multiplying your calorie figure by 4.2.
What are kilojoules?
With the introduction of the metric system, many countries shifted from measuring energy in calories (kcal) to measuring in food energy in kilojoules (kJ). The kilojoule is the metric unit of measurement for the energy value in food and drink. A kilojoule is a unit of measure of energy, in the same way that kilometres measure distance. Food energy used to be measured in Calories (Cal) and some countries still use this unit.
Kilojoules to calories chart
| kJ to calories |
kJ to calories |
| 1 kJ = 0.239 calories |
|
| 2 kJ = 0.478 calories |
|
| 3 kJ = 0.717 calories |
|
| 4 kJ = 0.956 calories |
|
| 5 kJ = 1.195 calories |
|
| 6 kJ = 1.434 calories |
50 kJ = 11.95 calories |
| 7 kJ = 1.673 calories |
70 kJ = 16.73 calories |
| 8 kJ = 1.912 calories |
80 kJ = 19.12 calories |
| 9 kJ = 2.151 calories |
90 kJ = 21.511 calories |
| 10 kJ = 2.39 calories |
100 kJ = 23.901 calories |
Note that conversions in the above chart are rounded to a maximum of 3 decimal places.
How many calories are in 500kJ?
500kJ is equal to 119.5 calories. You can calculate this by dividing 500 by 4.184, as there are 4.184kJ in 1 food calorie.
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