要转换的值源单位焦耳 (J)卡路里 (cal)千瓦时 (kWh)英热单位 (BTU)Electronvolt (eV)Foot-pound (energy) (ft·lbf)转换后的值目标单位焦耳 (J)卡路里 (cal)千瓦时 (kWh)英热单位 (BTU)Electronvolt (eV)Foot-pound (energy) (ft·lbf)