Gigajoules to Kilocalories Conversion

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

Results in Kilocalories:
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1 GJ = 239,005.736138 kcal

How to Convert Gigajoules to Kilocalories

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

Since one gigajoule is equal to 239,005.736138 kilocalories, you can use this simple formula to convert:

kilocalories = gigajoules × 239,005.736138

The energy in kilocalories is equal to the gigajoules multiplied by 239,005.736138.

For example, here's how to convert 5 gigajoules to kilocalories using the formula above.
5 GJ = (5 × 239,005.736138) = 1,195,028.680688 kcal

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


One gigajoule is equal to 1,000,000,000 joules, which are 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 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.


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.

Gigajoule to Kilocalorie Conversion Table

Gigajoule measurements converted to kilocalories
Gigajoules Kilocalories
0.00001 GJ 2.3901 kcal
0.00002 GJ 4.7801 kcal
0.00003 GJ 7.1702 kcal
0.00004 GJ 9.5602 kcal
0.00005 GJ 11.95 kcal
0.00006 GJ 14.34 kcal
0.00007 GJ 16.73 kcal
0.00008 GJ 19.12 kcal
0.00009 GJ 21.51 kcal
0.000001 GJ 0.239006 kcal
0.00001 GJ 2.3901 kcal
0.0001 GJ 23.9 kcal
0.001 GJ 239.01 kcal
0.01 GJ 2,390 kcal
0.1 GJ 23,901 kcal
1 GJ 239,006 kcal

More Gigajoule & Kilocalorie Conversions