This list of electrical constants represent the most common values used in engineering, physics, and chemistry. If you know of others that should be added, please send me an email. Visit NIST for all constants, units, and uncertainties. This is their Extensive Listing of constants. Here is a list of electrical units. Boltzmann  k  8.617 343 x 10^{5} eV (molecule·K) 1.380 650 5 x 10^{23} J/K  Charge Density^{†}   1.081 202 317 x 10^{12} C/m^{3}  Conductance Quantum  G_{0}  7.748 091 733 x 10^{5} S  Current^{†}   6.623 617 82 x 10^{3} Ω  Electron Charge/Mass Ratio  e/m_{e}  1.758 820 12 x 10^{11} C/kg  Electric Dipole Moment^{†}   8.478 353 09 x 10^{30} C·m  Electric Field^{†}   5.142 206 42 x 10^{11} V/m  Electric Field Gradient^{†}   9.717 361 82 x 10^{21} V/m^{2}  Electric Potential^{†}   27.211 384 5 V  Electric Quadrupole Moment^{†}   4.486 551 24 x 10^{40} m^{2}  Electron Volt  eV  1.602 176 53 x 10^{19} J  Elementary Charge  e  1.602 176 53 x 10^{19} C  Impedance of Free Space  Z_{0}  376.730 313 461 (120·π) Ω  Josephson  K_{J}  2.350 517 42 x 10^{5} T  Magnetic Flux Quantum  Φ_{0}  2.067 833 72 x 10^{15} Wb  Magnetic Flux Density^{†}   4.486 551 24 x 10^{40} C·m^{2}  Magnetizability^{†}   7.891 036 60 x 10^{29} J/T^{2}  Magnetic Flux Dipole Moment^{†}   1.854 801 90 x 10^{23} J/T  Permeability of Free Space  μ_{0}  1.256 637 061 4 x 10^{6} H/m (N/A^{2})  Permittivity of Free Space  ε_{0}  8.854 187 817 x 10^{12} F/m  Planck *  h  4.135 667 43 x 10^{15} eV·s 6.626 069 3 x 10^{34} J·s  von Klitzing  R_{K}  25 812.807 449 Ω  * : Reduced Planck constant, = h/2π † : Atomic Units 
