Conversion

Calories to Kilojoules Converter

Convert kilocalories to kilojoules instantly with a simple, free calculator.

The result restates the same energy amount in kilojoules, so it can be compared directly with labels or values given in kilojoules.

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.

Worked example

For example, 200 kilocalories × 4.184 = 836.8 kilojoules.

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.

Related calculators

Acres to Hectares Converter

Celsius to Fahrenheit Converter

Celsius to Kelvin Converter