Convert British Thermal Unit to Kilocalorie
Use this free converter to change british thermal units (BTU) into kilocalories (kcal). British thermal unit and kilocalorie both measure energy. As a quick reference, 1 BTU equals 0.2521644 kcal, and 1 kcal equals 3.9656668 BTU.
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Kilocalorie (kcal)
0.2521644
1 BTU = 0.2521644 kcal
Energy conversion table
| British Thermal Unit | Kilocalorie |
|---|---|
| 0.01 | 0.002521644 |
| 0.1 | 0.02521644 |
| 0.5 | 0.1260822 |
| 1 | 0.2521644 |
| 2 | 0.5043288 |
| 3 | 0.7564932 |
| 5 | 1.260822 |
| 10 | 2.521644 |
| 20 | 5.043288 |
| 25 | 6.30411 |
| 50 | 12.60822 |
| 100 | 25.21644 |
| 1,000 | 252.1644 |
How to convert British Thermal Unit to Kilocalorie
Multiply the british thermal unit value by 0.2521644 to get kilocalories.
- Enter the number of british thermal units you want to convert.
- The converter instantly shows the equivalent value in kilocalories.
- Worked example: 15 BTU × 0.2521644 = 3.782466 kcal.
- Use the swap button to reverse the conversion (kilocalorie to british thermal unit).
About these units
British Thermal Unit (BTU)
- Definition
- A British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit.
- History
- It developed with steam engineering in Britain and the United States.
- Current use
- BTUs rate heating, air-conditioning, and appliance energy in the US.
Kilocalorie (kcal)
- Definition
- A kilocalorie (kcal) is 1,000 small calories — the "Calorie" used on food labels.
- History
- It was adopted by nutritionists as a practical measure of food energy.
- Current use
- Kilocalories (food Calories) measure the energy content of food and diets.
Frequently asked questions
How many kilocalories are in a british thermal unit?
There are 0.2521644 kcal in 1 BTU. To convert, multiply the number of british thermal units by 0.2521644.
How do I convert british thermal units to kilocalories?
Multiply the british thermal unit value by 0.2521644 to get kilocalories. For example, 10 BTU = 2.521644 kcal.
Is this british thermal unit-to-kilocalorie converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert British Thermal Unit to other energy units
| Unit | 1 British Thermal Unit equals |
|---|---|
| Joule (J) | 1055.0558 J |
| Kilojoule (kJ) | 1.0550559 kJ |
| Calorie (cal) | 252.1644 cal |
| Kilocalorie (kcal) | 0.2521644 kcal |
| Watt Hour (Wh) | 0.29307107 Wh |
| Kilowatt Hour (kWh) | 0.00029307107 kWh |
| Electronvolt (eV) | 6.5851e+21 eV |
| Foot-Pound (ft·lb) | 778.16926 ft·lb |