Joules to Kilocalories Converter

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


Result in Kilocalories:

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1 J = 0.000239 kcal

Do you want to convert kilocalories to joules?

How to Convert Joules to Kilocalories

To convert a measurement in joules to a measurement in kilocalories, divide the energy by the following conversion ratio: 4,184 joules/kilocalorie.

Since one kilocalorie is equal to 4,184 joules, you can use this simple formula to convert:

kilocalories = joules ÷ 4,184

The energy in kilocalories is equal to the energy in joules divided by 4,184.

For example, here's how to convert 5,000 joules to kilocalories using the formula above.
kilocalories = (5,000 J ÷ 4,184) = 1.195029 kcal

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

What Is a Joule?

The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

Learn more about joules.

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.

Joule to Kilocalorie Conversion Table

Table showing various joule measurements converted to kilocalories.
Joules Kilocalories
1 J 0.000239 kcal
2 J 0.000478 kcal
3 J 0.000717 kcal
4 J 0.000956 kcal
5 J 0.001195 kcal
6 J 0.001434 kcal
7 J 0.001673 kcal
8 J 0.001912 kcal
9 J 0.002151 kcal
10 J 0.00239 kcal
20 J 0.00478 kcal
30 J 0.00717 kcal
40 J 0.00956 kcal
50 J 0.01195 kcal
60 J 0.01434 kcal
70 J 0.01673 kcal
80 J 0.01912 kcal
90 J 0.021511 kcal
100 J 0.023901 kcal
200 J 0.047801 kcal
300 J 0.071702 kcal
400 J 0.095602 kcal
500 J 0.119503 kcal
600 J 0.143403 kcal
700 J 0.167304 kcal
800 J 0.191205 kcal
900 J 0.215105 kcal
1,000 J 0.239006 kcal
2,000 J 0.478011 kcal
3,000 J 0.717017 kcal
4,000 J 0.956023 kcal
5,000 J 1.195 kcal
6,000 J 1.434 kcal
7,000 J 1.673 kcal
8,000 J 1.912 kcal
9,000 J 2.1511 kcal
10,000 J 2.3901 kcal


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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