Kilocalories to Joules Conversion

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

Results in Joules:
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1 kcal = 4,184 J

How to Convert Kilocalories to Joules

To convert a kilocalorie measurement to a joule measurement, multiply the energy by the conversion ratio.

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

joules = kilocalories × 4,184

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

For example, here's how to convert 5 kilocalories to joules using the formula above.
5 kcal = (5 × 4,184) = 20,920 J

How Many Joules Are in a Kilocalorie?

There are 4,184 joules in a kilocalorie, which is why we use this value in the formula above.

1 kcal = 4,184 J

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


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.


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.

Kilocalorie to Joule Conversion Table

Kilocalorie measurements converted to joules
Kilocalories Joules
0.001 kcal 4.184 J
0.002 kcal 8.368 J
0.003 kcal 12.55 J
0.004 kcal 16.74 J
0.005 kcal 20.92 J
0.006 kcal 25.1 J
0.007 kcal 29.29 J
0.008 kcal 33.47 J
0.009 kcal 37.66 J
0.01 kcal 41.84 J
0.02 kcal 83.68 J
0.03 kcal 125.52 J
0.04 kcal 167.36 J
0.05 kcal 209.2 J
0.06 kcal 251.04 J
0.07 kcal 292.88 J
0.08 kcal 334.72 J
0.09 kcal 376.56 J
0.1 kcal 418.4 J
0.2 kcal 836.8 J
0.3 kcal 1,255 J
0.4 kcal 1,674 J
0.5 kcal 2,092 J
0.6 kcal 2,510 J
0.7 kcal 2,929 J
0.8 kcal 3,347 J
0.9 kcal 3,766 J
1 kcal 4,184 J


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

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