Online calculator to convert calories to gigajoules (cal to GJ) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Energy units.
Conversion Calculator
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Convert calories to GJ
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between calories and gigajoules.
What is a calorie (cal)?
A calorie (or thermochemical calorie) is a unit of energy in the International System of Units (SI). The symbol for calorie is cal. There are 239,005,736.1376673 calories in a gigajoule. A calorie is measured as the quantity of heat required to raise the temperature of 1 gram of water by 1°C from a standard initial temperature at a pressure of 1 atmosphere. A calorie is also called a "small calorie" or "gram 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 0.000000004184 gigajoules in a calorie.
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 calories to GJ is:
GJ = calories x 0.000000004184
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from calories to gigajoules (cal to GJ).
Calorie to Gigajoule Conversion Example
Task: Convert 53,000,000 calories to gigajoules (show work) Formula: calories x 0.000000004184 = GJ Calculations: 53,000,000 calories x 0.000000004184 = 0.221752 GJ Result: 53,000,000 calories is equal to 0.221752 GJ
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from calories to gigajoules.
Calories to Gigajoules Conversion Chart
| calories (cal) | gigajoules (GJ) |
|---|---|
| 100 cal | 0.000000418 GJ |
| 250 cal | 0.000001046 GJ |
| 500 cal | 0.000002092 GJ |
| 750 cal | 0.000003138 GJ |
| 1,000 cal | 0.000004184 GJ |
| 2,500 cal | 0.00001046 GJ |
| 5,000 cal | 0.00002092 GJ |
| 7,500 cal | 0.00003138 GJ |
| 10,000 cal | 0.00004184 GJ |
| 25,000 cal | 0.0001046 GJ |
| 50,000 cal | 0.0002092 GJ |
| 75,000 cal | 0.0003138 GJ |
| 100,000 cal | 0.0004184 GJ |
| 250,000 cal | 0.001046 GJ |
| 500,000 cal | 0.002092 GJ |
| 750,000 cal | 0.003138 GJ |
| 1,000,000 cal | 0.004184 GJ |
| 2,500,000 cal | 0.01046 GJ |
| 5,000,000 cal | 0.02092 GJ |
| 7,500,000 cal | 0.03138 GJ |
| 10,000,000 cal | 0.04184 GJ |
| 25,000,000 cal | 0.1046 GJ |
| 50,000,000 cal | 0.2092 GJ |
| 75,000,000 cal | 0.3138 GJ |
| 100,000,000 cal | 0.4184 GJ |
| 250,000,000 cal | 1.046 GJ |
| 500,000,000 cal | 2.092 GJ |
| 750,000,000 cal | 3.138 GJ |
| 1,000,000,000 cal | 4.184 GJ |
Related Units
This table provides a summary of the Energy units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| calories (thermochemical) | cal | International System of Units (SI) |
| kilocalories | kcal | International System of Units (SI) |
| British Thermal Unit | BTU or Btu | Imperial System |
| joules | J | International System of Units (SI) |
| kilojoules | kJ | International System of Units (SI) |
| megajoules | MJ | International System of Units (SI) |
| gigajoules | GJ | International System of Units (SI) |
| terajoules | TJ | International System of Units (SI) |
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