Kilojoule to Calorie Converter
Convert kilojoules (kJ) to calories (kcal) and back.
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How to do it
- 1Fill in the boxes
Type your numbers or pick the options you need.
- 2See the result
The answer updates right away as you change a value.
- 3Use it
Copy the result or note it down. Nothing is sent anywhere.
About this tool
Australian food labels show energy in kilojoules. Enter kJ to get kilocalories, or enter kcal to get kJ. One kilocalorie equals 4.184 kilojoules, and what people call a calorie in food is a kilocalorie.
Frequently asked questions
How many kJ are in a calorie?
One kcal is 4.184 kJ.
How many kJ should I eat a day?
An average adult guide is about 8,700 kJ (2,080 kcal), but needs vary with age, size and activity.