Conversion
Calories to Kilojoules Converter
Convert kilocalories to kilojoules instantly with a simple, free calculator.
Formula
Kilojoules = Kilocalories × 4.184. Multiply the value in kilocalories by 4.184 to get the value in kilojoules.
How it works
Enter a value in kilocalories. The calculator multiplies it by the conversion factor and shows the equivalent in kilojoules, rounded to at most four decimal places so long decimals stay readable. Negative values are converted the same way, since the factor applies in both directions of the scale.
FAQs
How many kilojoules are in 1 kilocalories?
One kilocalories equals 4.184 kilojoules. Multiply any value in kilocalories by 4.184 to get kilojoules.
Is this kilocalories to kilojoules conversion exact?
Food labels use kilocalories (often just called calories). One kilocalorie equals 4.184 kilojoules by the thermochemical definition.
When would I need a kilocalories to kilojoules conversion?
Any time a measurement, label, or instruction is given in kilocalories and you need to work, compare, or record it in kilojoules — for example while shopping, travelling, cooking, studying, or planning a project.