About Energy

Energy is the capacity to do work.

Common Unit Families

Metric / SI

Joule, Kilojoule, Megajoule, Gigajoule, Watt Hour, Kilowatt Hour, Megawatt Hour, Kilocalorie

Imperial / customary

British Thermal Unit, Foot-Pound Force

Specialty

Calorie, Therm (US), Electronvolt, Erg

Supported Units

• J Joule
• kJ Kilojoule
• MJ Megajoule
• GJ Gigajoule
• Wh Watt Hour
• kWh Kilowatt Hour
• MWh Megawatt Hour
• cal Calorie
• kcal Kilocalorie
• BTU British Thermal Unit
• therm Therm (US)
• ft⋅lbf Foot-Pound Force
• eV Electronvolt
• erg Erg