How many kilojoules are in a Calorie?

1 Calorie (kcal) equals 4.184 kilojoules (kJ).

How do I convert kJ to Calories?

Divide the kilojoules by 4.184. For example, 2,000 kJ is about 478 Cal.

Calculator › kJ to Cal

kJ to Calories Converter

Australian food labels use kilojoules. Many apps and diets use Calories. Convert instantly below.

Kilojoules (kJ)

Calories (kcal)

Quick reference

kJ	Calories
500 kJ	120 Cal
1,000 kJ	239 Cal
2,000 kJ	478 Cal
5,000 kJ	1,195 Cal
6,000 kJ	1,434 Cal
7,000 kJ	1,673 Cal
8,700 kJ	2,079 Cal
10,000 kJ	2,390 Cal

The Australian Dietary Guidelines reference diet is 8,700 kJ (about 2,080 Cal) a day. Your own needs depend on age, size and activity: try the calorie deficit calculator or look up kJ in common Aussie foods.