The coulomb could in principle be defined in terms of the charge of an electron or elementary charge. Since the values of the Josephson constant [] (CIPM (1988) Recommendation 1, PV 56; 19) and von Klitzing constant [] (CIPM (1988), Recommendation 2, PV 56; 20) constants have been given conventional values (KJ ≡ 4.835 97914 Hz/V and RK ≡ 2.581 280 7×104Ω), it is possible to combine these values to form an alternative (not yet official) definition of the coulomb. A coulomb is then equal to exactly 6.241 509 629 152 65 x 1018 elementary charges. Combined with the current definition of the ampere, this proposed definition would make the kilogram a derived unit.
One mole of electrons (approximately 6.022 1023, or Avogadro's number []) is known as a faraday (actually -1 faraday, since electrons are negatively charged). One faraday equals 96.485 341 5 kC (the Faraday constant []). In terms of Avogadro's number (NA), one coulomb is equal to approximately 1.036 x NA x 10-5 elementary charges.
one ampere-hour = 3600 C
The elementary charge is approximately 160.2176 zC.
One statcoulomb (statC), the CGS electrostatic unit of charge (esu), is approximately 3.3356 x 10-10C or about 1/3 nC.