Energy is the property that must be transferred to an object in order to perform work on, or to heat the object; it can be converted in form, but not created or destroyed. The SI unit of energy is the joule (J), which is the energy transferred to an object by the mechanical work of moving it a distance of 1 meter against a force of 1 newton. This Energy converter allows you to convert attojoule (aJ), Btu (IT) (Btu (IT), Btu), Btu (th) (Btu (th)), calorie (IT) (cal (IT), cal), calorie (nutritional), calorie (th) (cal (th)), dyne-centimeter (dyn·cm), electron-volt (eV), erg (erg), foot-pound (ft·lbf), fuel oil equivalent @barrel (US), fuel oil equivalent @kiloliter, gigajoule (GJ), gigaton (Gton), gigawatt-hour (GW·h), gram-force-centimeter (gf·cm), gram-force-meter (gf·m), Hartree energy, horsepower (metric)-hour (cv·h), horsepower-hour (hp·h), inch-ounce (in·ozf), inch-pound (in·lbf), joule (J) among other units related to Energy.