Kilocalories to Joules Conversion (kcal to J)

Kilocalories to Joules Converter

Enter the energy in kilocalories below to convert it to joules.

Result in Joules:

1 kcal = 4,184 J

How to Convert Kilocalories to Joules

To convert a measurement in kilocalories to a measurement in joules, multiply 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:

joules = kilocalories × 4,184

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

For example, here's how to convert 5 kilocalories to joules using the formula above.

joules = (5 kcal × 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.

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 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.

Kilocalorie to Joule Conversion Table

Table showing various 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

Table showing various 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

References

International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf