CONVERT accepts the following text values for Energy
Energy From_unit or to_unit Joule"J" Erg"e" Thermodynamic calorie"c" IT calorie"cal" Electron volt"eV" (or "ev") Horsepower-hour"HPh" (or "hh") Watt-hour"Wh" (or "wh") Foot-pound"flb" BTU"BTU" (or "btu") Referenced from Excel Help