Gigajoules to Calories Conversion

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

Results in Calories:
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1 GJ = 239,005,736.13767 cal

How to Convert Gigajoules to Calories

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

Since one gigajoule is equal to 239,005,736.13767 calories, you can use this simple formula to convert:

calories = gigajoules × 239,005,736.13767

The energy in calories is equal to the gigajoules multiplied by 239,005,736.13767.

For example, here's how to convert 5 gigajoules to calories using the formula above.
5 GJ = (5 × 239,005,736.13767) = 1,195,028,680.6883 cal

Gigajoules and calories 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 calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius.

When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie."

Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

Gigajoule to Calorie Conversion Table

Gigajoule measurements converted to calories
Gigajoules Calories
0.00000001 GJ 2.3901 cal
0.00000002 GJ 4.7801 cal
0.00000003 GJ 7.1702 cal
0.00000004 GJ 9.5602 cal
0.00000005 GJ 11.95 cal
0.00000006 GJ 14.34 cal
0.00000007 GJ 16.73 cal
0.00000008 GJ 19.12 cal
0.00000009 GJ 21.51 cal
0.000000001 GJ 0.239006 cal
0.00000001 GJ 2.3901 cal
0.0000001 GJ 23.9 cal
0.000001 GJ 239.01 cal
0.00001 GJ 2,390 cal
0.0001 GJ 23,901 cal
0.001 GJ 239,006 cal
0.01 GJ 2,390,057 cal
0.1 GJ 23,900,574 cal
1 GJ 239,005,736 cal

More Gigajoule & Calorie Conversions