Kilocalories (kcal) to British thermal units (BTU) Conversion
Kilocalories
The kilocalorie (kcal), commonly called a "Calorie" (capital C) in nutritional contexts, is a unit of energy equal to exactly 4,184 joules. It represents the energy needed to raise 1 kg of water by 1 °C. In nutrition, all food energy values are expressed in kcal per gram: carbohydrates and protein provide 4 kcal/g; fat provides 9 kcal/g; alcohol provides 7 kcal/g. An average adult requires approximately 2,000–2,500 kcal per day to maintain body weight.
British thermal units
The British thermal unit (BTU) is a unit of energy approximately equal to 1,055.06 joules, defined as the energy required to raise the temperature of one pound of water by one degree Fahrenheit. It remains the standard unit for heating and cooling capacity in HVAC systems in the United States: air conditioners and furnaces are rated in BTU/hour. A typical residential air conditioner is rated at 5,000–24,000 BTU/h. One BTU equals approximately 0.000293 kWh.
| Kilocalories (kcal) | British thermal units (BTU) |
|---|---|
| 0.1 kcal | 0.3966 BTU |
| 1 kcal | 3.9657 BTU |
| 2 kcal | 7.9313 BTU |
| 3 kcal | 11.897 BTU |
| 5 kcal | 19.8283 BTU |
| 10 kcal | 39.6567 BTU |
| 20 kcal | 79.3133 BTU |
| 30 kcal | 118.97 BTU |
| 50 kcal | 198.2833 BTU |
| 100 kcal | 396.5667 BTU |
| 1000 kcal | 3,965.6668 BTU |
Frequently Asked Questions (FAQ)
How many British thermal units are in 1 kilocalories?
1 kilocalories (kcal) is exactly 3.9657 British thermal units (BTU).
How do I convert kilocalories to British thermal units?
Multiply the value in kilocalories by 3.9657 to get the result in British thermal units. Or use the converter above — type any number and see the result instantly.