Kilocalories to Kilojoules Converter

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

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1 kcal = 4.184 kJ

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How to Convert Kilocalories to Kilojoules

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To convert a measurement in kilocalories to a measurement in kilojoules, multiply the energy by the following conversion ratio: 4.184 kilojoules/kilocalorie.

Since one kilocalorie is equal to 4.184 kilojoules, you can use this simple formula to convert:

kilojoules = kilocalories × 4.184

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

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

How Many Kilojoules Are in a Kilocalorie?

There are 4.184 kilojoules in a kilocalorie, which is why we use this value in the formula above.

1 kcal = 4.184 kJ

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

What is a Kilocalorie?

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.

Learn more about kilocalories.

What is a Kilojoule?

One kilojoule is equal to 1,000 joules, which is 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 thousands, or 103. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

Learn more about kilojoules.

Kilocalorie to Kilojoule Conversion Table

Table showing various 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

More Kilocalorie & Kilojoule Conversions