Joule to all other Energy conversions


Joule is derived as unit of energy. It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of the force's motion through a distance of one metre (1 newton metre or N.m). It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second.

Definition in formula:

J= kg.m2/s2 = N.m = pa .m3 = W.s = C.V = Ω.A2.s

One joule can also be defined as the following:

  • The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one coulomb-volt (C.V). This relationship can be used to define the volt.
  • The work required to produce one watt of power for one second, or one watt-second (W.s) (compare kilowatt-hour – 3.6 megajoules). This relationship can be used to define the watt.

The joule is named after James Prescott Joule. As with every SI unit named for a person, its symbol starts with an upper case letter (J), but when written in full it follows the rules for capitalisation of a common noun; i.e., "joule" becomes capitalised at the beginning of a sentence and in titles, but is otherwise in lower case.

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Standard Units
Gigajoule {{gigajoule}}
Megajoule {{megajoule}}
Kilojoule {{kilojoule}}
Millijoule {{millijoule}}
Microjoule {{microjoule}}
Nanojoule {{nanojoule}}
Attojoule {{attojoule}}
Megaelectron-volt {{megaelectronvolt}}
Kiloelectron-volt {{kiloelectronvolt}}
Electron-volt {{electronvolt}}
Erg {{erg}}
Other Units
Gigawatt-hour {{gigawatthour}}
Megawatt-hour {{megawatthour}}
Kilowatt-hour {{kilowatthour}}
Kilowatt-second {{kilowattsec}}
Watt-hour {{watthour}}
Watt-second {{wattsec}}
Newton meter {{newtonmeter}}
Horsepower hour {{horsepowerhour}}
Horsepower (metric) hour {{horsepowermetrichour}}
Kilocalorie (IT) {{kilocalorieit}}
Kilocalorie (th) {{kilocalorieth}}
Calorie (IT) {{calorieit}}
Calorie (th) {{calorieth}}
Calorie (Nutritional) {{calorie}}
Btu (IT) {{btuit}}
Btu (th) {{btuth}}
Mega Btu (IT) {{megabtuit}}
Ton-hour (refrigeration) {{tonhour}}
Fuel oil equivalent {{fueloilequivalent}}
Gigaton {{gigaton}}
Megaton {{megaton}}
Kiloton {{kiloton}}
Ton {{ton}}
Dyne centimeter {{dyne}}
Gram-force meter {{gramforcemeter}}
Gram-force centimeter {{gramforcecentimeter}}
Kilogram-force centimeter {{kilogramforcecentimeter}}
Kilogram-force meter {{kilogramforcemeter}}
Kilopond meter {{kilopondmeter}}
Pound-force foot {{poundforcefoot}}
Pound-force inch {{poundforceinch}}
Ound-force inch {{oundforceinch}}
Foot-pound {{footpound}}
Inch-pound {{inchpound}}
Inch-ound {{inchound}}
Poundal foot {{poundalfoot}}
Therm {{therm}}
Therm (EC) {{thermec}}
Therm (US) {{thermus}}
Hartree energy {{hartree}}
Rydberg constant {{rydberg}}