Use this useful tool to convert weight choosing one of the 10 units of measurment included in this app, that are:
Coulom:
coulomb, millicoulomb, microcoulomb, nanocoulomb
Ampere-hour:
amperehour, milliamperehour, amperesecond,milliamperesecond
Other units:
faraday, elementary charge
For every units of measurment are also included formulas to convert that unit as you want.