British thermal unit (IT) (BTU)
International Table BTU: exactly 1055.05585262 joules.
What is a British thermal unit?
- Symbol
- BTU
- Quantity
- Energy
- Unit system
- US customary
- Definition
- International Table BTU: exactly 1055.05585262 joules.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used in the United States for heating and cooling equipment, natural gas and fuel energy.
British thermal unit (IT) in other energy units
- 1 BTU = 1055.05585262 JJoule
- 1 BTU = 1.05505585262 kJBritish thermal unit (IT) to Kilojoule converter
- 1 BTU = 0.00105505585262 MJMegajoule
- 1 BTU ≈ 0.2930710702 WhWatt-hour
- 1 BTU ≈ 0.0002930710702 kWhBritish thermal unit (IT) to Kilowatt-hour converter
- 1 BTU ≈ 252.1644007 calCalorie (thermochemical)
- 1 BTU ≈ 0.2521644007 kcalKilocalorie (thermochemical)
- 1 BTU ≈ 778.1692623 ft·lbfFoot-pound-force
- 1 BTU ≈ 6.585140678e+21 eVElectronvolt
- 1 BTU = 10550558526.2 ergErg
British thermal unit (IT) quick reference
| British thermal unit (IT) | Kilojoule | Kilowatt-hour | Kilocalorie (thermochemical) |
|---|---|---|---|
| 1 BTU | = 1.05505585262 kJ | ≈ 0.0002930710702 kWh | ≈ 0.2521644007 kcal |
| 10 BTU | = 10.5505585262 kJ | ≈ 0.002930710702 kWh | ≈ 2.521644007 kcal |
| 100 BTU | = 105.505585262 kJ | ≈ 0.02930710702 kWh | ≈ 25.21644007 kcal |
| 1000 BTU | = 1055.05585262 kJ | ≈ 0.2930710702 kWh | ≈ 252.1644007 kcal |
Where the British thermal unit fits
The next smaller energy unit is the kilojoule (kJ). 1 BTU = 1.05505585262 kJ, and 1 kJ ≈ 0.9478171203 BTU.
The next larger energy unit is the watt-hour (Wh). 1 BTU ≈ 0.2930710702 Wh, and 1 Wh ≈ 3.412141633 BTU.
Frequently asked questions
- How many kilojoules are in one British thermal unit?
- One British thermal unit = 1.05505585262 kJ (kilojoules).
- How many kilowatt-hours are in one British thermal unit?
- One British thermal unit ≈ 0.0002930710702 kWh (kilowatt-hours).
- How many kilocalories are in one British thermal unit?
- One British thermal unit ≈ 0.2521644007 kcal (kilocalories).