Online calculator to convert joules to kilocalories (J to kcal) 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 J to kilocalories
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 joules and kilocalories.
What is a joule (J)?
A joule is a unit of energy in the International System of Units (SI). The symbol for joule is J. There are 4,184 joules in a kilocalorie.
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 0.00023901 kilocalories in a joule. 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".
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 J to kilocalories is:
kilocalories = J ÷ 4,184
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from joules to kilocalories (J to kcal).
Joule to Kilocalorie Conversion Example
Task: Convert 83,680 joules to kilocalories (show work) Formula: J ÷ 4,184 = kilocalories Calculations: 83,680 J ÷ 4,184 = 20 kilocalories Result: 83,680 J is equal to 20 kilocalories
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from joules to kilocalories.
Joules to Kilocalories Conversion Chart
| joules (J) | kilocalories (kcal) |
|---|---|
| 1 J | 0.00023901 kcal |
| 2 J | 0.00047801 kcal |
| 3 J | 0.00071702 kcal |
| 4 J | 0.00095602 kcal |
| 5 J | 0.00119503 kcal |
| 6 J | 0.00143403 kcal |
| 7 J | 0.00167304 kcal |
| 8 J | 0.00191205 kcal |
| 9 J | 0.00215105 kcal |
| 10 J | 0.00239006 kcal |
| 20 J | 0.00478011 kcal |
| 30 J | 0.00717017 kcal |
| 40 J | 0.00956023 kcal |
| 50 J | 0.01195029 kcal |
| 75 J | 0.01792543 kcal |
| 100 J | 0.02390057 kcal |
| 250 J | 0.05975143 kcal |
| 500 J | 0.11950287 kcal |
| 750 J | 0.1792543 kcal |
| 1,000 J | 0.23900574 kcal |
| 2,500 J | 0.59751434 kcal |
| 5,000 J | 1.19502868 kcal |
| 7,500 J | 1.79254302 kcal |
| 10,000 J | 2.39005736 kcal |
| 25,000 J | 5.9751434 kcal |
| 50,000 J | 11.95028681 kcal |
| 75,000 J | 17.92543021 kcal |
| 100,000 J | 23.90057361 kcal |
| 250,000 J | 59.75143403 kcal |
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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