Unit J
Name joule
Category Energy
Details The Joule (symbol: J) is a unit of energy in the International System of Units (SI). It is used to quantify various forms of energy, including mechanical, electrical, and heat energy. It is named after the English physicist James Prescott Joule, who contributed significantly to the understanding of the principle of conservation of energy and the first law of thermodynamics.

One Joule is defined as the amount of work done or energy transferred when a force of one Newton is applied over a distance of one meter in the direction of the force. This makes Joule a derived unit, as it's dependent on two base SI units, the Newton for force and meter for distance. In terms of other units, a Joule can also be expressed as:

- 1 J = 1 Nm (Newton meter)
- 1 J = 1 kg·m²/s² (kilogram meters squared per seconds squared)
- 1 J = 1 Ws (Watt second)

In the field of energy, Joule plays a crucial role since it serves as a common metric for various forms of energy consumption and conversions. For instance, it is used to measure the energy content of fuels, calculate the efficiency of engines or machines, assess energy consumption of electrical devices, and quantify heat exchange in thermal systems.
J(joule) to acal(attocalorie)J(joule) to acal [15 °C](attocalorie)J(joule) to acal [IT](attocalorie)J(joule) to aeV(attoelectron volt)J(joule) to aJ(attojoule)J(joule) to at [TNT](attotonne)J(joule) to aW h(attowatt hour)J(joule) to BTU(British thermal unit)J(joule) to BTU [15 °C](British thermal unit)J(joule) to BTU [IT](British thermal unit)J(joule) to cal(calorie)J(joule) to cal [15 °C](calorie)J(joule) to Cal [food](calorie)J(joule) to cal [IT](calorie)J(joule) to ccal(centicalorie)J(joule) to ccal [15 °C](centicalorie)J(joule) to ccal [IT](centicalorie)J(joule) to ceV(centielectron volt)J(joule) to cJ(centijoule)J(joule) to ct [TNT](centitonne)J(joule) to cW h(centiwatt hour)J(joule) to dacal(decacalorie)J(joule) to dacal [15 °C](decacalorie)J(joule) to dacal [IT](decacalorie)J(joule) to daeV(decaelectron volt)J(joule) to daJ(decajoule)J(joule) to dat [TNT](decatonne)J(joule) to daW h(decawatt hour)J(joule) to dcal(decicalorie)J(joule) to dcal [15 °C](decicalorie)J(joule) to dcal [IT](decicalorie)J(joule) to deV(decielectron volt)J(joule) to dJ(decijoule)J(joule) to dt [TNT](decitonne)J(joule) to Dth [EC](decatherm)J(joule) to dW h(deciwatt hour)J(joule) to Ecal(exacalorie)J(joule) to Ecal [15 °C](exacalorie)J(joule) to Ecal [IT](exacalorie)J(joule) to EeV(exaelectron volt)J(joule) to EJ(exajoule)J(joule) to ergJ(joule) to Et [TNT](exatonne)J(joule) to eV(electron volt)J(joule) to EW h(exawatt hour)J(joule) to fcal(femtocalorie)J(joule) to fcal [15 °C](femtocalorie)J(joule) to fcal [IT](femtocalorie)J(joule) to feV(femtoelectron volt)J(joule) to fJ(femtojoule)J(joule) to ft lbf(foot-pound force)J(joule) to ft [TNT](femtotonne)J(joule) to fW h(femtowatt hour)J(joule) to Gcal(gigacalorie)J(joule) to Gcal [15 °C](gigacalorie)J(joule) to Gcal [IT](gigacalorie)J(joule) to GeV(gigaelectron volt)J(joule) to GJ(gigajoule)J(joule) to Gt [TNT](gigatonne)J(joule) to GW h(gigawatt hour)J(joule) to Ha(hartree)J(joule) to hcal(hectocalorie)J(joule) to hcal [15 °C](hectocalorie)J(joule) to hcal [IT](hectocalorie)J(joule) to heV(hectoelectron volt)J(joule) to hJ(hectojoule)J(joule) to ht [TNT](hectotonne)J(joule) to hW h(hectowatt hour)J(joule) to kcal(kilocalorie)J(joule) to kcal [15 °C](kilocalorie)J(joule) to kcal [IT](kilocalorie)J(joule) to keV(kiloelectron volt)J(joule) to kJ(kilojoule)J(joule) to kt [TNT](kilotonne)J(joule) to kW h(kilowatt hour)J(joule) to MBTU [IT](thousand British thermal units)J(joule) to Mcal(megacalorie)J(joule) to mcal(millicalorie)J(joule) to Mcal [15 °C](megacalorie)J(joule) to mcal [15 °C](millicalorie)J(joule) to Mcal [IT](megacalorie)J(joule) to mcal [IT](millicalorie)J(joule) to MDth [EC](thousand decatherms)J(joule) to MeV(megaelectron volt)J(joule) to meV(millielectron volt)J(joule) to MJ(megajoule)J(joule) to mJ(millijoule)J(joule) to MMBTU [IT](million British thermal units)J(joule) to MMDth [EC](million decatherms)J(joule) to Mt [TNT](megatonne)J(joule) to mt [TNT](millitonne)J(joule) to MW h(megawatt hour)J(joule) to mW h(milliwatt hour)J(joule) to ncal(nanocalorie)J(joule) to ncal [15 °C](nanocalorie)J(joule) to ncal [IT](nanocalorie)J(joule) to neV(nanoelectron volt)J(joule) to nJ(nanojoule)J(joule) to nt [TNT](nanotonne)J(joule) to nW h(nanowatt hour)J(joule) to Pcal(petacalorie)J(joule) to pcal(picocalorie)J(joule) to Pcal [15 °C](petacalorie)J(joule) to pcal [15 °C](picocalorie)J(joule) to Pcal [IT](petacalorie)J(joule) to pcal [IT](picocalorie)J(joule) to PeV(petaelectron volt)J(joule) to peV(picoelectron volt)J(joule) to PJ(petajoule)J(joule) to pJ(picojoule)J(joule) to Pt [TNT](petatonne)J(joule) to pt [TNT](picotonne)J(joule) to PW h(petawatt hour)J(joule) to pW h(picowatt hour)J(joule) to quadJ(joule) to t [TNT](tonne)J(joule) to Tcal(teracalorie)J(joule) to Tcal [15 °C](teracalorie)J(joule) to Tcal [IT](teracalorie)J(joule) to TeV(teraelectron volt)J(joule) to th(thermie)J(joule) to thm [EC](therm)J(joule) to thm [Imperial](therm)J(joule) to thm [US](therm)J(joule) to TJ(terajoule)J(joule) to toe(tonne of oil equivalent)J(joule) to Tt [TNT](teratonne)J(joule) to TW h(terawatt hour)J(joule) to W h(watt hour)J(joule) to ycal(yoctocalorie)J(joule) to Ycal(yottacalorie)J(joule) to ycal [15 °C](yoctocalorie)J(joule) to Ycal [15 °C](yottacalorie)J(joule) to ycal [IT](yoctocalorie)J(joule) to Ycal [IT](yottacalorie)J(joule) to yeV(yoctoelectron volt)J(joule) to YeV(yottaelectron volt)J(joule) to yJ(yoctojoule)J(joule) to YJ(yottajoule)J(joule) to yt [TNT](yoctotonne)J(joule) to Yt [TNT](yottatonne)J(joule) to yW h(yoctowatt hour)J(joule) to YW h(yottawatt hour)J(joule) to zcal(zeptocalorie)J(joule) to Zcal(zettacalorie)J(joule) to zcal [15 °C](zeptocalorie)J(joule) to Zcal [15 °C](zettacalorie)J(joule) to zcal [IT](zeptocalorie)J(joule) to Zcal [IT](zettacalorie)J(joule) to zeV(zeptoelectron volt)J(joule) to ZeV(zettaelectron volt)J(joule) to zJ(zeptojoule)J(joule) to ZJ(zettajoule)J(joule) to zt [TNT](zeptotonne)J(joule) to Zt [TNT](zettatonne)J(joule) to zW h(zeptowatt hour)J(joule) to ZW h(zettawatt hour)J(joule) to µcal(microcalorie)J(joule) to µcal [15 °C](microcalorie)J(joule) to µcal [IT](microcalorie)J(joule) to µeV(microelectron volt)J(joule) to µJ(microjoule)J(joule) to µt [TNT](microtonne)J(joule) to µW h(microwatt hour)