Kilojoules to Calories Converter
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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 in many countries, the kilojoule (kJ) replaced the food calorie (kcal) in measurements of food energy. This has created a need for converting between kilojoules and calories.
Kilojoules to calories chart
| kJ to calories | kJ to calories |
|---|---|
| 1 kJ = 0.239 calorie | 10 kJ = 2.39 calories |
| 2 kJ = 0.478 calorie | 20 kJ = 4.78 calories |
| 3 kJ = 0.717 calorie | 30 kJ = 7.17 calories |
| 4 kJ = 0.956 calorie | 40 kJ = 9.56 calories |
| 5 kJ = 1.195 calories | 50 kJ = 11.95 calories |
| 6 kJ = 1.434 calories | 60 kJ = 14.34 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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