Convert kilocalories to GJ

Conversion Calculator

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How to convert kilocalories to GJ: Enter a value in the kilocalories field and click on the "Calculate GJ" button. Your answer will appear in the GJ field.

Conversion Definitions

The following is a list of definitions relating to conversions between kilocalories and gigajoules.

What is a kilocalorie (kcal)?

A kilocalorie is a unit of energy in the International System of Units (SI). The symbol for kilocalorie is kcal. There are 239,005.73613767 kilocalories in a gigajoule. A kilocalorie is measured as the quantity of heat required to raise the temperature of 1 kilogram of water by 1°C from a standard initial temperature at a pressure of 1 atmosphere. A kilocalorie is also called a "large calorie" or "kilogram calorie".

What is a gigajoule (GJ)?

A gigajoule is a unit of energy in the International System of Units (SI). The symbol for gigajoule is GJ. There are 0.000004184 gigajoules in a kilocalorie.

Conversion Formula

Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.

The formula to convert from kilocalories to GJ is:

GJ = kilocalories x 0.000004184

Conversion Example

Next, let's look at an example showing the work and calculations that are involved in converting from kilocalories to gigajoules (kcal to GJ).

Kilocalorie to Gigajoule Conversion Example

Task: Convert 65,000 kilocalories to GJ (show work)

Formula:
kilocalories x 0.000004184 = GJ

Calculations:
65,000 kilocalories x 0.000004184 = 0.27196 GJ

Result:
65,000 kilocalories is equal to 0.27196 GJ

Conversion Table

For quick reference purposes, below is a conversion table that you can use to convert from kilocalories to gigajoules.

Kilocalories to Gigajoules Conversion Chart

kilocalories (kcal)	gigajoules (GJ)
1 kcal	0.00000418 GJ
2 kcal	0.00000837 GJ
3 kcal	0.00001255 GJ
4 kcal	0.00001674 GJ
5 kcal	0.00002092 GJ
6 kcal	0.0000251 GJ
7 kcal	0.00002929 GJ
8 kcal	0.00003347 GJ
9 kcal	0.00003766 GJ
10 kcal	0.00004184 GJ
20 kcal	0.00008368 GJ
30 kcal	0.00012552 GJ
40 kcal	0.00016736 GJ
50 kcal	0.0002092 GJ
75 kcal	0.0003138 GJ
100 kcal	0.0004184 GJ
250 kcal	0.001046 GJ
500 kcal	0.002092 GJ
750 kcal	0.003138 GJ
1,000 kcal	0.004184 GJ
2,500 kcal	0.01046 GJ
5,000 kcal	0.02092 GJ
7,500 kcal	0.03138 GJ
10,000 kcal	0.04184 GJ
25,000 kcal	0.1046 GJ
50,000 kcal	0.2092 GJ
75,000 kcal	0.3138 GJ
100,000 kcal	0.4184 GJ
250,000 kcal	1.046 GJ

Related Units

This table provides a summary of the Energy units within their respective measurement systems.

Unit	Symbol	Measurement System	Description
calories (thermochemical)	cal	International System of Units (SI)	1 cal = 4.184 J
kilocalories	kcal	International System of Units (SI)	1,000 cal = 1 kcal
British Thermal Unit	BTU or Btu	Imperial System	1 BTU = 1,055 J
joules	J	International System of Units (SI)	base unit
kilojoules	kJ	International System of Units (SI)	1,000 J = 1 kJ
megajoules	MJ	International System of Units (SI)	1,000,000 J = 1 MJ
gigajoules	GJ	International System of Units (SI)	1,000,000,000 J = 1 GJ
terajoules	TJ	International System of Units (SI)	1,000,000,000,000 J = 1 TJ

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