Convert British Thermal Units (BTU) to Kilocalories (kcal)
Enter a value below to convert British Thermal Units (BTU) to Kilocalories (kcal).
Conversion:
1 British Thermal Units (BTU) = 0.25216539197 Kilocalories (kcal)
How to Convert British Thermal Units (BTU) to Kilocalories (kcal)
1 btu = 0.25216539197 kcal
1 kcal = 3.9656512426 btu
Example: convert 15 British Thermal Units (BTU) to Kilocalories (kcal):
25 btu = 6.3041347992 kcal
British Thermal Units (BTU) to Kilocalories (kcal) Conversion Table
| British Thermal Units (BTU) | Kilocalories (kcal) |
|---|---|
| 0.01 btu | 0.0025216539197 kcal |
| 0.1 btu | 0.025216539197 kcal |
| 1 btu | 0.25216539197 kcal |
| 2 btu | 0.50433078394 kcal |
| 3 btu | 0.75649617591 kcal |
| 5 btu | 1.2608269598 kcal |
| 10 btu | 2.5216539197 kcal |
| 20 btu | 5.0433078394 kcal |
| 50 btu | 12.608269598 kcal |
| 100 btu | 25.216539197 kcal |
| 1000 btu | 252.16539197 kcal |
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.
Kilocalories (kcal)
Definition
A kilocalorie (kcal), also known as a food calorie or large calorie, equals 1,000 small calories or approximately 4,184 joules. It is the standard unit for measuring dietary energy.
History
The kilocalorie became the standard unit for food energy labeling in the United States and many other countries during the 20th century. Nutritionist Wilbur Olin Atwater pioneered its use in dietary science.
Current use
Kilocalories are the primary unit for food energy on nutrition labels in the US, Canada, and much of Asia. They are also used in exercise science, dietetics, and metabolic rate calculations.