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Engineering ToolBox > Energy Content some Common Sources
The energy content in some common energy sources can be found in the table below:
| Energy Source | Unit | Energy Content (BTU) |
| Electricity | 1 Kilowatt-hour | 3,412 |
| Coal | 1 Short Ton | 20,681,000 |
| Crude Oil | 1 Barrel - 42 gallons | 5,800,000 |
| Diesel Fuel | 1 Gallon | 139,000 |
| Gasoline | 1 Gallon | 124,000 |
| Natural Gas | 1 Cubic Foot | 1,026 |
| Heating Oil | 1 Gallon | 139,000 |
| Propane | 1 Gallon | 91,000 |
| Residual Fuel Oil 1) | 1 Barrel - 42 gallons | 6,287,000 |
1) Residual Fuel Oil - The liquid or semi-liquid, high-boiling fraction of residue from the distillation of crude oil.
The unit of heat in the imperial system - the BTU - is
An item using one kilowatt-hour of electricity will generate 3412 BTU.