Convert Calorie (cal) to British Thermal Unit (BTU)
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Updated on September 1, 2025
You can use our Calorie (cal) to British Thermal Unit (BTU) conversion calculator as a reliable and efficient tool to simplify energy conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of Calorie (cal) to British Thermal Unit (BTU) is crucial in Nutrition, Energy related measurements. You can avoid the risk of manual calculation errors and save valuable time using our Calorie (cal) to British Thermal Unit (BTU) converter.About Calorie (cal) to British Thermal Unit (BTU) Conversion Calculator
Written By
Nadiba Rahman
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Mrinmoy Roy
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Relation Between Calorie (cal) and British Thermal Unit (BTU)
Let me explain to you about the relation between Calorie cal and British Thermal Unit (BTU) first before moving to the conversion process. Because it’s essential to grasp what these units represent.What is Calorie (cal)?
A calorie is the amount of heat energy required to raise the temperature of one gram of pure water by one degree Celsius. Calorie (cal) is a unit of energy measurement which is commonly used in Nutrition, Energy. Calories are commonly used to measure the energy content of food. The term "calorie" is often used interchangeably with "kilocalorie" in the context of food and nutrition..What is British Thermal Unit (BTU)?
Calorie (cal) is another unit of energy measurement that is used in Heating, Energy. A British Thermal Unit is the amount of heat energy required to raise the temperature of one pound of liquid water by one degree Fahrenheit.. Calories are commonly used to measure the energy content of food. The term "calorie" is often used interchangeably with "kilocalorie" in the context of food and nutrition..How to Convert British Thermal Unit (BTU)?
The conversion between Calorie (cal) and British Thermal Unit (BTU) follows a simple formula:Calorie = Calorie × 0.00396832071032
Where, 0.00396832071032 is the value that allows you to convert between Calorie (cal) and British Thermal Unit (BTU).
So,
1 British Thermal Unit = 0.00396832071032 Calorie
And, 1 Calorie = 1/0.00396832071032 British Thermal Unit

Examples of Converting Calorie (cal) to British Thermal Unit (BTU)
To convert any value from Calorie (cal) to British Thermal Unit (BTU), simply multiply the amount of Calorie (cal) by the conversion factor:1 British Thermal Unit = 0.00396832071032 Calorie
For example, if you want to convert 5 Calorie into British Thermal Unit and the conversion factor is 0.00396832071032, then:
5 Calorie = 5 x 0.00396832071032 British Thermal Unit
Calorie (cal) to British Thermal Unit (BTU) Conversion Chart
Here’s a quick reference chart for common conversions between Calorie (cal) and British Thermal Unit (BTU)| Calorie (cal) | British Thermal Unit (BTU) |
|---|---|
| 10 Calorie (cal) | 0.0396832071032 British Thermal Unit (BTU) |
| 20 Calorie (cal) | 0.0793664142064 British Thermal Unit (BTU) |
| 30 Calorie (cal) | 0.11904962130959999 British Thermal Unit (BTU) |
| 40 Calorie (cal) | 0.1587328284128 British Thermal Unit (BTU) |
| 50 Calorie (cal) | 0.19841603551599998 British Thermal Unit (BTU) |
| 60 Calorie (cal) | 0.23809924261919999 British Thermal Unit (BTU) |
| 70 Calorie (cal) | 0.2777824497224 British Thermal Unit (BTU) |
| 80 Calorie (cal) | 0.3174656568256 British Thermal Unit (BTU) |
| 90 Calorie (cal) | 0.35714886392879996 British Thermal Unit (BTU) |
| 100 Calorie (cal) | 0.39683207103199997 British Thermal Unit (BTU) |
How 1 Calorie (cal) Converts to Other energy Units
See the relation between Calorie (cal) and other energy related measurement units:| 1 Calorie(cal) | 41868000.000000 Erg (erg) |
| 1 Calorie(cal) | 26131400000000000000.000000 Electronvolt (ev) |
| 1 Calorie(cal) | 0.000000 Exajoule (EJ) |
| 1 Calorie(cal) | 3.087000 Foot-pound (ft lbs) |
| 1 Calorie(cal) | 0.000000 Gigajoule (GJ) |
| 1 Calorie(cal) | 0.000000 Gigawatt-hour (GWh) |
| 1 Calorie(cal) | 4.186800 Joule (J) |
| 1 Calorie(cal) | 0.001000 Kilocalorie (KCal) |
| 1 Calorie(cal) | 0.004187 Kilojoule (KJ) |
| 1 Calorie(cal) | 0.000004 Megajoule (MJ) |
| 1 Calorie(cal) | 0.000000 Megawatt-hour (MWh) |
| 1 Calorie(cal) | 0.000004 Natural Gas Low Heating Value (NG LHV) |
| 1 Calorie(cal) | 4.186800 Newton-meter (Nm) |
| 1 Calorie(cal) | 0.000000 Therms |
| 1 Calorie(cal) | 0.001163 Watt-hour (Wh) |
| 1 Calorie(cal) | 0.000001 Kilowatt-hour (kwh) |
| 1 Calorie(cal) | 4.186800 Watt-second (Ws) |
Features of Our Calorie (cal) to British Thermal Unit (BTU) Conversion Calculator
Our Calorie cal to British Thermal Unit (BTU) converter is more than just a basic converter. Here's what makes it stand out:Output Precision Control
You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.Customizable Rounding Options
You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.Multiple Number Formats
Display your results the way you want:- Standard format (e.g. 12.345245)
- Scientific notation (e.g. 1.23452e+1)
- Engineering format (e.g. 1.23452 × 10^1)

