Kilocalories to Gigajoules Converter

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

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Results in Gigajoules:
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1 kcal = 4.184E-6 GJ
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert gigajoules to kilocalories?

How to Convert Kilocalories to Gigajoules

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To convert a measurement in kilocalories to a measurement in gigajoules, multiply the energy by the following conversion ratio: 4.184E-6 gigajoules/kilocalorie.

Since one kilocalorie is equal to 4.184E-6 gigajoules, you can use this simple formula to convert:

gigajoules = kilocalories × 4.184E-6

The energy in gigajoules is equal to the energy in kilocalories multiplied by 4.184E-6.

For example, here's how to convert 500,000 kilocalories to gigajoules using the formula above.
gigajoules = (500,000 kcal × 4.184E-6) = 2.092 GJ

Kilocalories and gigajoules 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 Gigajoule?

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

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for billions, or 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

Learn more about gigajoules.

Kilocalorie to Gigajoule Conversion Table

Table showing various kilocalorie measurements converted to gigajoules.
Kilocalories Gigajoules
1 kcal 0.000004184 GJ
2 kcal 0.000008368 GJ
3 kcal 0.000012552 GJ
4 kcal 0.000016736 GJ
5 kcal 0.00002092 GJ
6 kcal 0.000025104 GJ
7 kcal 0.000029288 GJ
8 kcal 0.000033472 GJ
9 kcal 0.000037656 GJ
10 kcal 0.00004184 GJ
100 kcal 0.000418 GJ
1,000 kcal 0.004184 GJ
10,000 kcal 0.04184 GJ
100,000 kcal 0.4184 GJ
1,000,000 kcal 4.184 GJ

More Kilocalorie & Gigajoule Conversions