British thermal unit (BTU)
The heat needed to raise one pound of water by 1 °F; used for HVAC in the US.
Result
1 British thermal unit = 1,055.055853 joules
British thermal unit at a glance
| Unit name | British thermal unit (plural: British thermal units) |
|---|---|
| Symbol | BTU |
| Quantity measured | Energy |
| Measurement system | US customary |
| Also known as | btu, btus, british thermal units |
| Definition exact? | No — factor is rounded |
1 British thermal unit in other energy units
| Unit | 1 BTU equals |
|---|---|
| Joule | 1,055.05585 J |
| Kilojoule | 1.05505585 kJ |
| Megajoule | 0.001055056 MJ |
| Calorie | 252.164401 cal |
| Kilocalorie | 0.252164401 kcal |
| Watt-hour | 0.29307107 Wh |
| Kilowatt-hour | 0.000293071 kWh |
| Megawatt-hour | 0.000000293 MWh |
| Electronvolt | 6.58514068 × 10²¹ eV |
| Therm | 0.00001 thm |
| Foot-pound | 778.169262 ft·lb |
Popular British thermal unit conversions
Frequently asked questions
- What is a British thermal unit?
- The heat needed to raise one pound of water by 1 °F; used for HVAC in the US.
- What is the symbol for the British thermal unit?
- The symbol for the British thermal unit is BTU. It measures energy.
- How many joules are in a British thermal unit?
- 1 British thermal unit = 1,055.05585 joules.
- How many kilojoules are in a British thermal unit?
- 1 British thermal unit = 1.05505585 kilojoules.
- How many kilocalories are in a British thermal unit?
- 1 British thermal unit = 0.252164401 kilocalories.