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Conversion between units index
Energy conversion diagram
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Conversion between units of energy is given by use of appropriate factors. Choose the required input and output units in the menus.
Energy

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notes
The SI unit for energy is the Joule (J), but this is often inconvenient for use with other units. Science often uses molecular or quantum mechanics-based units such as the electronvolt or Hartree, and other industries have their own units such as the British Thermal Unit (BTU) for heating, and the kWh (kiloWatt-hour) for domestic electricity comsumption.