Unit of energy

watt hour small calorie Rydberg energy horsepower-hour kilowatt hour erg quad gigawatt hour British thermal unit (thermochemical) milliwatt-hour barrel of oil equivalent joule foe terawatt hour kilocalorie petawatt hour tonne of oil equivalent kilojoule foot-poundal megawatt hour foot-pound watt second electronvolt therm (US) megawatt thermal Planck energy