Convert Kilocalories to Kilojoules

Enter the energy in kilocalories below to get the value converted to kilojoules.

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1 kcal = 4.184 kJ

How to Convert Kilocalories to Kilojoules

To convert a kilocalorie measurement to a kilojoule measurement, multiply the energy by the conversion ratio. One kilocalorie is equal to 4.184 kilojoules, so use this simple formula to convert:

kilojoules = kilocalories × 4.184

The energy in kilojoules is equal to the kilocalories multiplied by 4.184.

For example, here's how to convert 5 kilocalories to kilojoules using the formula above.
5 kcal = (5 × 4.184) = 20.92 kJ

Kilocalories and kilojoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

Kilocalories

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal, for example 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

Kilojoules

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 103. Kilojoules can be abbreviated as kJ, for example 1 kilojoule can be written as 1 kJ.

Kilocalorie to Kilojoule Conversion Table

Kilocalorie measurements converted to kilojoules
Kilocalories Kilojoules
1 kcal 4.184 kJ
2 kcal 8.368 kJ
3 kcal 12.55 kJ
4 kcal 16.74 kJ
5 kcal 20.92 kJ
6 kcal 25.1 kJ
7 kcal 29.29 kJ
8 kcal 33.47 kJ
9 kcal 37.66 kJ
10 kcal 41.84 kJ
11 kcal 46.02 kJ
12 kcal 50.21 kJ
13 kcal 54.39 kJ
14 kcal 58.58 kJ
15 kcal 62.76 kJ
16 kcal 66.94 kJ
17 kcal 71.13 kJ
18 kcal 75.31 kJ
19 kcal 79.5 kJ
20 kcal 83.68 kJ
21 kcal 87.86 kJ
22 kcal 92.05 kJ
23 kcal 96.23 kJ
24 kcal 100.42 kJ
25 kcal 104.6 kJ
26 kcal 108.78 kJ
27 kcal 112.97 kJ
28 kcal 117.15 kJ
29 kcal 121.34 kJ
30 kcal 125.52 kJ
31 kcal 129.7 kJ
32 kcal 133.89 kJ
33 kcal 138.07 kJ
34 kcal 142.26 kJ
35 kcal 146.44 kJ
36 kcal 150.62 kJ
37 kcal 154.81 kJ
38 kcal 158.99 kJ
39 kcal 163.18 kJ
40 kcal 167.36 kJ