Direct answer

How Many Calories in a Kilojoule? 1 kJ ≈ 239.006 cal

1 kilojoule ≈ 239.006 small calories (cal). Food labels usually need kilocalories: divide kJ by 4.184 for kcal.

Question

How many calories are in a kilojoule?

1 kilojoule (kJ) equals about 239.006 small calories (cal). For food Calories (kcal), 1 kJ ≈ 0.239 kcal.

1 kJ

≈ 239.006 cal

1 kJ

≈ 0.239006 kcal

1 kcal

≈ 4.184 kJ

1 cal = 4.184 J, so 1 kJ = 1000 J ≈ 239.006 cal.

Nutrition panels that show “Calories” almost always mean kilocalories: kcal = kJ ÷ 4.184.

EU/AU labels often print both kJ and kcal — use the matching converter for the unit you need.

Important caveat

Confirm whether the question means small calorie (cal) or food kilocalorie (kcal / Cal).