Energy Converter
Unit definitions
Joule
The joule is the SI unit of energy. It is defined as the work done when a force of one newton is applied over a distance of one meter.
Kilojoule
$10^{3} \ \text{J}$ is a kilojoule.
Calorie (small calorie)
The small calorie is the thermal energy required to raise the temperature of one gram of water by one degree Celsius. It is equal to $4.184 \ \text{J}$.
Food calorie (large calorie)
$10^{3}$ small calories is a food calorie. When we talk about calories in our food, we usually mean large calories.
British thermal unit
The British thermal unit (Btu) is the amount of thermal energy required to raise the temperature of one pound of water by one degree Fahrenheit.
Therm
$100\,000$ British thermal units is a therm.
Electronvolt
An electronvolt is the kinetic energy gained by an electron accelerating through a potential difference of one volt.
Kilo-electronvolt
$10^{3} \ \text{eV}$ is a kilo-electronvolt.
Mega-electronvolt
$10^{6} \ \text{eV}$ is a mega-electronvolt.
Giga-electronvolt
$10^{9} \ \text{eV}$ is a giga-electronvolt.
Tera-electronvolt
$10^{12} \ \text{eV}$ is a tera-electronvolt.