Online calculator to convert kilocalories to kilojoules (kcal to kJ) 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 kilocalories to kJ
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 kilocalories and kilojoules.
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 0.23900574 kilocalories in a kilojoule. 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 kilojoule (kJ)?
A kilojoule is a unit of energy in the International System of Units (SI). The symbol for kilojoule is kJ. There are 4.184 kilojoules 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 kJ is:
kJ = kilocalories x 4.184
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from kilocalories to kilojoules (kcal to kJ).
Kilocalorie to Kilojoule Conversion Example
Task: Convert 25 kilocalories to kilojoules (show work) Formula: kilocalories x 4.184 = kJ Calculations: 25 kilocalories x 4.184 = 104.6 kJ Result: 25 kilocalories is equal to 104.6 kJ
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from kilocalories to kilojoules.
Kilocalories to Kilojoules Conversion Chart
| kilocalories (kcal) | kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 3 kcal | 12.552 kJ |
| 4 kcal | 16.736 kJ |
| 5 kcal | 20.92 kJ |
| 6 kcal | 25.104 kJ |
| 7 kcal | 29.288 kJ |
| 8 kcal | 33.472 kJ |
| 9 kcal | 37.656 kJ |
| 10 kcal | 41.84 kJ |
| 20 kcal | 83.68 kJ |
| 30 kcal | 125.52 kJ |
| 40 kcal | 167.36 kJ |
| 50 kcal | 209.2 kJ |
| 75 kcal | 313.8 kJ |
| 100 kcal | 418.4 kJ |
| 250 kcal | 1,046 kJ |
| 500 kcal | 2,092 kJ |
| 750 kcal | 3,138 kJ |
| 1,000 kcal | 4,184 kJ |
| 2,500 kcal | 10,460 kJ |
| 5,000 kcal | 20,920 kJ |
| 7,500 kcal | 31,380 kJ |
| 10,000 kcal | 41,840 kJ |
| 25,000 kcal | 104,600 kJ |
| 50,000 kcal | 209,200 kJ |
| 75,000 kcal | 313,800 kJ |
| 100,000 kcal | 418,400 kJ |
| 250,000 kcal | 1,046,000 kJ |
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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