What is a BTU?
Definition
BTU
The British Thermal Unit (BTU) is the energy needed to raise one pound of water by 1°F, equal to approximately 1,055 joules. Widely used in HVAC and heating systems.
Unit system
Imperial
Convert btu
All energy units
| Unit | Symbol | System |
|---|---|---|
| joules | J | SI / Metric |
| kilojoules | kJ | SI / Metric |
| megajoules | MJ | SI / Metric |
| calories | cal | Heat & Food |
| kilocalories | kcal | Heat & Food |
| watt-hours | Wh | Electrical |
| kilowatt-hours | kWh | Electrical |
| megawatt-hours | MWh | Electrical |
| BTU | BTU | Imperial |
| electronvolts | eV | Scientific |
| foot-pounds | ft·lb | Imperial |
| ergs | erg | Scientific |