Unit feV
Name femtoelectron volt
Category Energy
Details A femtoelectron volt (feV) is a unit of energy used to measure very small energy differences or interactions at a subatomic scale, specifically in the field of particle physics and quantum mechanics. It is derived from the electron volt (eV), which is the energy gained or lost by a single electron when it is accelerated through an electric potential difference of one volt.

The prefix "femto-" (symbolized by the letter 'f') represents a factor of 10^-15. Therefore, one femtoelectron volt (1 feV) is equal to 10^-15 electron volts (eV). In the international system of units (SI), 1 eV is approximately 1.6 x 10^-19 joules. Hence, 1 feV is approximately 1.6 x 10^-34 joules. This extremely small unit of energy is useful for dealing with particle energy scales and interactions that happen at the quantum level, such as those involving neutrinos or other elementary particles.
feV(femtoelectron volt) to acal(attocalorie)feV(femtoelectron volt) to acal [15 °C](attocalorie)feV(femtoelectron volt) to acal [IT](attocalorie)feV(femtoelectron volt) to aeV(attoelectron volt)feV(femtoelectron volt) to aJ(attojoule)feV(femtoelectron volt) to at [TNT](attotonne)feV(femtoelectron volt) to aW h(attowatt hour)feV(femtoelectron volt) to BTU(British thermal unit)feV(femtoelectron volt) to BTU [15 °C](British thermal unit)feV(femtoelectron volt) to BTU [IT](British thermal unit)feV(femtoelectron volt) to cal(calorie)feV(femtoelectron volt) to cal [15 °C](calorie)feV(femtoelectron volt) to Cal [food](calorie)feV(femtoelectron volt) to cal [IT](calorie)feV(femtoelectron volt) to ccal(centicalorie)feV(femtoelectron volt) to ccal [15 °C](centicalorie)feV(femtoelectron volt) to ccal [IT](centicalorie)feV(femtoelectron volt) to ceV(centielectron volt)feV(femtoelectron volt) to cJ(centijoule)feV(femtoelectron volt) to ct [TNT](centitonne)feV(femtoelectron volt) to cW h(centiwatt hour)feV(femtoelectron volt) to dacal(decacalorie)feV(femtoelectron volt) to dacal [15 °C](decacalorie)feV(femtoelectron volt) to dacal [IT](decacalorie)feV(femtoelectron volt) to daeV(decaelectron volt)feV(femtoelectron volt) to daJ(decajoule)feV(femtoelectron volt) to dat [TNT](decatonne)feV(femtoelectron volt) to daW h(decawatt hour)feV(femtoelectron volt) to dcal(decicalorie)feV(femtoelectron volt) to dcal [15 °C](decicalorie)feV(femtoelectron volt) to dcal [IT](decicalorie)feV(femtoelectron volt) to deV(decielectron volt)feV(femtoelectron volt) to dJ(decijoule)feV(femtoelectron volt) to dt [TNT](decitonne)feV(femtoelectron volt) to Dth [EC](decatherm)feV(femtoelectron volt) to dW h(deciwatt hour)feV(femtoelectron volt) to Ecal(exacalorie)feV(femtoelectron volt) to Ecal [15 °C](exacalorie)feV(femtoelectron volt) to Ecal [IT](exacalorie)feV(femtoelectron volt) to EeV(exaelectron volt)feV(femtoelectron volt) to EJ(exajoule)feV(femtoelectron volt) to ergfeV(femtoelectron volt) to Et [TNT](exatonne)feV(femtoelectron volt) to eV(electron volt)feV(femtoelectron volt) to EW h(exawatt hour)feV(femtoelectron volt) to fcal(femtocalorie)feV(femtoelectron volt) to fcal [15 °C](femtocalorie)feV(femtoelectron volt) to fcal [IT](femtocalorie)feV(femtoelectron volt) to fJ(femtojoule)feV(femtoelectron volt) to ft lbf(foot-pound force)feV(femtoelectron volt) to ft [TNT](femtotonne)feV(femtoelectron volt) to fW h(femtowatt hour)feV(femtoelectron volt) to Gcal(gigacalorie)feV(femtoelectron volt) to Gcal [15 °C](gigacalorie)feV(femtoelectron volt) to Gcal [IT](gigacalorie)feV(femtoelectron volt) to GeV(gigaelectron volt)feV(femtoelectron volt) to GJ(gigajoule)feV(femtoelectron volt) to Gt [TNT](gigatonne)feV(femtoelectron volt) to GW h(gigawatt hour)feV(femtoelectron volt) to Ha(hartree)feV(femtoelectron volt) to hcal(hectocalorie)feV(femtoelectron volt) to hcal [15 °C](hectocalorie)feV(femtoelectron volt) to hcal [IT](hectocalorie)feV(femtoelectron volt) to heV(hectoelectron volt)feV(femtoelectron volt) to hJ(hectojoule)feV(femtoelectron volt) to ht [TNT](hectotonne)feV(femtoelectron volt) to hW h(hectowatt hour)feV(femtoelectron volt) to J(joule)feV(femtoelectron volt) to kcal(kilocalorie)feV(femtoelectron volt) to kcal [15 °C](kilocalorie)feV(femtoelectron volt) to kcal [IT](kilocalorie)feV(femtoelectron volt) to keV(kiloelectron volt)feV(femtoelectron volt) to kJ(kilojoule)feV(femtoelectron volt) to kt [TNT](kilotonne)feV(femtoelectron volt) to kW h(kilowatt hour)feV(femtoelectron volt) to MBTU [IT](thousand British thermal units)feV(femtoelectron volt) to Mcal(megacalorie)feV(femtoelectron volt) to mcal(millicalorie)feV(femtoelectron volt) to Mcal [15 °C](megacalorie)feV(femtoelectron volt) to mcal [15 °C](millicalorie)feV(femtoelectron volt) to Mcal [IT](megacalorie)feV(femtoelectron volt) to mcal [IT](millicalorie)feV(femtoelectron volt) to MDth [EC](thousand decatherms)feV(femtoelectron volt) to MeV(megaelectron volt)feV(femtoelectron volt) to meV(millielectron volt)feV(femtoelectron volt) to MJ(megajoule)feV(femtoelectron volt) to mJ(millijoule)feV(femtoelectron volt) to MMBTU [IT](million British thermal units)feV(femtoelectron volt) to MMDth [EC](million decatherms)feV(femtoelectron volt) to Mt [TNT](megatonne)feV(femtoelectron volt) to mt [TNT](millitonne)feV(femtoelectron volt) to MW h(megawatt hour)feV(femtoelectron volt) to mW h(milliwatt hour)feV(femtoelectron volt) to ncal(nanocalorie)feV(femtoelectron volt) to ncal [15 °C](nanocalorie)feV(femtoelectron volt) to ncal [IT](nanocalorie)feV(femtoelectron volt) to neV(nanoelectron volt)feV(femtoelectron volt) to nJ(nanojoule)feV(femtoelectron volt) to nt [TNT](nanotonne)feV(femtoelectron volt) to nW h(nanowatt hour)feV(femtoelectron volt) to Pcal(petacalorie)feV(femtoelectron volt) to pcal(picocalorie)feV(femtoelectron volt) to Pcal [15 °C](petacalorie)feV(femtoelectron volt) to pcal [15 °C](picocalorie)feV(femtoelectron volt) to Pcal [IT](petacalorie)feV(femtoelectron volt) to pcal [IT](picocalorie)feV(femtoelectron volt) to PeV(petaelectron volt)feV(femtoelectron volt) to peV(picoelectron volt)feV(femtoelectron volt) to PJ(petajoule)feV(femtoelectron volt) to pJ(picojoule)feV(femtoelectron volt) to Pt [TNT](petatonne)feV(femtoelectron volt) to pt [TNT](picotonne)feV(femtoelectron volt) to PW h(petawatt hour)feV(femtoelectron volt) to pW h(picowatt hour)feV(femtoelectron volt) to quadfeV(femtoelectron volt) to t [TNT](tonne)feV(femtoelectron volt) to Tcal(teracalorie)feV(femtoelectron volt) to Tcal [15 °C](teracalorie)feV(femtoelectron volt) to Tcal [IT](teracalorie)feV(femtoelectron volt) to TeV(teraelectron volt)feV(femtoelectron volt) to th(thermie)feV(femtoelectron volt) to thm [EC](therm)feV(femtoelectron volt) to thm [Imperial](therm)feV(femtoelectron volt) to thm [US](therm)feV(femtoelectron volt) to TJ(terajoule)feV(femtoelectron volt) to toe(tonne of oil equivalent)feV(femtoelectron volt) to Tt [TNT](teratonne)feV(femtoelectron volt) to TW h(terawatt hour)feV(femtoelectron volt) to W h(watt hour)feV(femtoelectron volt) to ycal(yoctocalorie)feV(femtoelectron volt) to Ycal(yottacalorie)feV(femtoelectron volt) to ycal [15 °C](yoctocalorie)feV(femtoelectron volt) to Ycal [15 °C](yottacalorie)feV(femtoelectron volt) to ycal [IT](yoctocalorie)feV(femtoelectron volt) to Ycal [IT](yottacalorie)feV(femtoelectron volt) to yeV(yoctoelectron volt)feV(femtoelectron volt) to YeV(yottaelectron volt)feV(femtoelectron volt) to yJ(yoctojoule)feV(femtoelectron volt) to YJ(yottajoule)feV(femtoelectron volt) to yt [TNT](yoctotonne)feV(femtoelectron volt) to Yt [TNT](yottatonne)feV(femtoelectron volt) to yW h(yoctowatt hour)feV(femtoelectron volt) to YW h(yottawatt hour)feV(femtoelectron volt) to zcal(zeptocalorie)feV(femtoelectron volt) to Zcal(zettacalorie)feV(femtoelectron volt) to zcal [15 °C](zeptocalorie)feV(femtoelectron volt) to Zcal [15 °C](zettacalorie)feV(femtoelectron volt) to zcal [IT](zeptocalorie)feV(femtoelectron volt) to Zcal [IT](zettacalorie)feV(femtoelectron volt) to zeV(zeptoelectron volt)feV(femtoelectron volt) to ZeV(zettaelectron volt)feV(femtoelectron volt) to zJ(zeptojoule)feV(femtoelectron volt) to ZJ(zettajoule)feV(femtoelectron volt) to zt [TNT](zeptotonne)feV(femtoelectron volt) to Zt [TNT](zettatonne)feV(femtoelectron volt) to zW h(zeptowatt hour)feV(femtoelectron volt) to ZW h(zettawatt hour)feV(femtoelectron volt) to µcal(microcalorie)feV(femtoelectron volt) to µcal [15 °C](microcalorie)feV(femtoelectron volt) to µcal [IT](microcalorie)feV(femtoelectron volt) to µeV(microelectron volt)feV(femtoelectron volt) to µJ(microjoule)feV(femtoelectron volt) to µt [TNT](microtonne)feV(femtoelectron volt) to µW h(microwatt hour)