Energy Converter
Convert between different units of energy including joules, calories, kilowatt-hours, BTU, and more.
Common Energy Units
Additional Energy Units
About Energy Units
Basic Energy Units:
- Joule (J): The SI unit of energy
- Kilojoule (kJ): 1,000 joules
- Calorie (cal): Amount of energy needed to raise 1g of water by 1°C
- Kilocalorie (kcal): 1,000 calories (food Calories)
Electrical & Thermal Units:
- Watt-hour (Wh): Energy of 1 watt expended for 1 hour
- Kilowatt-hour (kWh): 1,000 watt-hours (utility billing)
- BTU: British Thermal Unit, used for heating/cooling
- Electron Volt (eV): Energy gained by an electron moving across 1 volt
Energy units are used in various fields including physics, nutrition, electricity, and engineering. The joule is the standard SI unit, but different industries often use specialized units.
Common Conversions:
- 1 kilocalorie (kcal) = 4.184 kilojoules (kJ)
- 1 kilowatt-hour (kWh) = 3.6 megajoules (MJ)
- 1 BTU = 1,055 joules (J)
- 1 joule (J) = 6.242 × 1018 electron volts (eV)
- 1 food Calorie = 1 kilocalorie (kcal)