kJ to calories

How to convert kJ to calories

Divide the kilojoules by 4.184. To do it in your head, divide by 4 and take a little off: 2,600 kJ ÷ 4 is 650, and the real answer is 621 calories.

Going the other way, multiply calories by 4.184. A 500 calorie meal is about 2,100 kJ.

Cal, kcal and calories

They're the same thing. The Calories on menus and in fitness apps are kilocalories, so 1 Cal = 1 kcal = 4.184 kJ.

What's the 8,700 kJ on menu boards?

It's the average adult daily energy intake used on Australian labels, about 2,080 calories. It's a reference point, not your personal target.

More on reading an Australian menu board in kJ vs calories, explained. Or skip the maths: Macro Menu shows calories and kJ side by side for every item on the menu.