Energy Conversion Calculator

Energy Conversion Calculator

An energy converter calculator. Select the units you wish to use and enter the value in the input units in the first text box. The result will be displayed in the second text box.

Convert energy measurements between: Btu (th), Btu (mean), calories (IT), calories (th), calories (mean), calories (15C), calories (20C), calories (food), centigrade heat units, electron volts, ergs, foot-pound force, foot poundals, gigajoules, horsepower hours, inch-pound force, joules, kilocalories (IT), kilocalories (th), kilogram-force meters, kilojoules, kilowatt hours, megajoules, newton meters, therms, watt seconds, watt hours

Joules to kJ conversion
Joules to BTU conversion
Joules to Calories conversion
Joules to kcal conversion
Joules to kWh conversion
Joules to eV conversion
kJ to Joules conversion
kJ to BTU conversion
kJ to calories conversion
kJ to kcal conversion
BTU to kJ conversion
BTU to Joules conversion
BTU to kWh conversion
kWh to BTU conversion
kWh to Joules conversion
Calories to Joules conversion
Calories to kJ conversion
Calories to kcal conversion
kcal to calories conversion
kcal to joules conversion
kcal to kJ conversion
eV to joules conversion
eV to keV conversion
eV to MeV conversion
eV to GeV conversion
keV to eV conversion
MeV to eV conversion
GeV to eV conversion

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The SI unit of energy rate (energy per unit time) is the watt, which is a joule per second. Thus, one joule is one watt-second, and 3600 joules equal one watt-hour. The CGS energy unit is the erg and the imperial and US customary unit is the foot pound. Other energy units such as the electronvolt, food calorie or thermodynamic kcal (based on the temperature change of water in a heating process), and BTU are used in specific areas of science and commerce.