Energy
Calories to Kilojoule
Convert calories to kilojoule instantly.
About this conversion
A calorie (cal) is the energy needed to raise 1 g of water by 1°C. 1 cal = 4.184 J. Kilojoule (kJ) = 1.000 J. EU-madevaredeklarationer skal angive energiindhold i kJ. En voksen har et dagsbehov på ca. 8.400 kJ, en banan indeholder ca. 370 kJ, og et glas appelsinjuice ca. 450 kJ. 239.01 calories equal 1 Kilojoule. The converter above calculates the result instantly — you can also swap the units to convert in the other direction.
How to use
Enter a value in the calories field and instantly see the result in kilojoule. Click the swap button to reverse the conversion.
Manual calculation
1 calories = 0.004184 kilojoule. Example: 10 cal = 0.04184 kJ.
Frequently asked questions
How do you convert calories to kilojoule?
Divide the number of calories by 239.01 to get kilojoule. Example: 1,000 cal ÷ 239.01 = 4.184 kJ.
Are calories bigger or smaller than kilojoule?
Calories is smaller than Kilojoule. There are 239.01 calories in one kilojoule, so the result is a smaller number when converting from calories to kilojoule.
What is 100 calories in kilojoule?
100 cal equals 0.4184 kJ.
How many calories are in 1 kilojoule?
1 kJ equals 239.01 cal. This is the reverse conversion — useful if you have a value in kilojoule and want it in calories.
What is calorie?
A calorie (cal) is the energy needed to raise 1 g of water by 1°C. 1 cal = 4.184 J.
What is kilojoule used for?
Kilojoule (kJ) = 1.000 J. EU-madevaredeklarationer skal angive energiindhold i kJ. En voksen har et dagsbehov på ca. 8.400 kJ, en banan indeholder ca. 370 kJ, og et glas appelsinjuice ca. 450 kJ.