Energy Transferred by Working
Energy and Thermal Physics
Conversions
Physics Narrative
for 11-14
Standard and not so standard units
The standard unit for energy is the joule, but not all energies are quoted in joules. There is therefore a very real chance that you will come across data in awkward units. If you need to perform conversions, the following tables should help.
Energy conversion table
| energy unit | equivalent |
|---|---|
| joule | 1 J |
| kilojoule | 1000 J |
| megajoule | 1 000 000 J |
| gigajoule | 1 000 000 000 J |
| terajoule | 1 000 000 000 000 J |
| Btu | 1055 J |
| therm | 105 500 000 J |
| gallon of petrol | 131 000 000 J |
| barrel of petrol | 5 498 000 000 J |
| barrel of crude oil | 6 119 000 000 J |
| ton of coal | 21 896 000 000 J |
| million cubic feet of natural gas | 1 083 000 000 000 J |
| calorie | 4.1868 J |
| kilocalorie | 4186.8 J |
| kilowatt-hour | 3 600 000 J |
Power conversion table
| quantity | equivalent |
|---|---|
| 1 Btu per hour | 0.293 W |
| 1 joule per second | 1 W |
| 1 kilowatt hour per day | 41.7 W |
| 1 food calorie per minute | 69.77 W |
| 1 horsepower | 745.7 W |
| 1 kilowatt | 1000 W |
| 1 Btu per second | 1054 W |
| 1 gallon of gasoline per hour | 39 kW |
| 1 million barrels of oil per day | 73 GW |
