KJ to Calories Converter
Convert kilojoules to calories
Frequently Asked Questions
How do I convert kilojoules to calories?
Divide kJ by 4.184. 1 kJ = 0.239 kcal. 8,700 kJ = 2,079 calories. Quick estimate: divide kJ by 4.2. The converter handles both directions for nutritional calculations.
How many calories is 100 kJ?
100 kJ = 23.9 calories (kcal). This is roughly the energy in a small apple or a tablespoon of sugar. The converter provides instant conversion for reading food labels from different countries.
Why do Australian food labels use kJ?
Australia, New Zealand, and many European countries use kilojoules as the primary energy unit on food labels, following the metric system. The US and UK primarily use calories. Both measure the same thing — food energy.
What is the daily recommended intake in kJ?
Average adult: 8,700 kJ (2,080 kcal) for women, 10,500 kJ (2,510 kcal) for men. These are general guidelines — actual needs depend on age, weight, height, and activity level.
Is a kilojoule the same as a joule?
1 kilojoule = 1,000 joules. Food energy is measured in kilojoules because joules are too small for practical use. A single calorie (kcal) = 4,184 joules = 4.184 kJ. The converter handles both joules and kilojoules.