| EnergyMeasures and Measurement | 
| What are the approximate heating values of fuels? | 
| Fuel | BTU | Unit of Measure | 
| Oil | 141,000 | gallon | 
| Coal | 31,000 | pound | 
| Natural gas | 1,000 | cubic feet | 
| Steam | 1,000 | cubic feet | 
| Electricity | 3,413 | kilowatt hour | 
| Gasoline | 124,000 | gallon | 
A BTU (British thermal unit), a common energy measurement, is defined as the amount of energy required to raise the temperature of one pound of water by 1°F.
