Convert British Thermal Units (BTU) to Calories (cal)
Enter a value below to convert British Thermal Units (BTU) to Calories (cal).
Conversion:
1 British Thermal Units (BTU) = 252.16539197 Calories (cal)
How to Convert British Thermal Units (BTU) to Calories (cal)
1 btu = 252.16539197 cal
1 cal = 0.0039656512426 btu
Example: convert 15 British Thermal Units (BTU) to Calories (cal):
25 btu = 6304.1347992 cal
British Thermal Units (BTU) to Calories (cal) Conversion Table
| British Thermal Units (BTU) | Calories (cal) |
|---|---|
| 0.01 btu | 2.5216539197 cal |
| 0.1 btu | 25.216539197 cal |
| 1 btu | 252.16539197 cal |
| 2 btu | 504.33078394 cal |
| 3 btu | 756.49617591 cal |
| 5 btu | 1260.8269598 cal |
| 10 btu | 2521.6539197 cal |
| 20 btu | 5043.3078394 cal |
| 50 btu | 12608.269598 cal |
| 100 btu | 25216.539197 cal |
| 1000 btu | 252165.39197 cal |
British Thermal Units (BTU)
Definition
A British Thermal Unit (BTU) is an imperial unit of energy defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It equals approximately 1,055.06 joules.
History
The BTU originated in the British imperial measurement system in the 19th century. Despite the global shift toward metric units, it remains entrenched in US, UK, and Canadian HVAC and energy industries.
Current use
BTUs are the standard unit for rating heating and cooling equipment (furnaces, air conditioners), measuring natural gas energy content, and comparing fuel efficiencies in North America.
Calories (cal)
Definition
A calorie (cal), also known as a small calorie or gram calorie, is defined as the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius. It equals approximately 4.184 joules.
History
The calorie was first defined by French chemist Nicolas Clément in 1824. It was widely used in chemistry and physiology before the joule became the official SI unit of energy.
Current use
Small calories are used in chemistry and physics for heat measurements. In everyday language, 'calorie' often refers to the kilocalorie (kcal) when discussing food energy.