Calculate the mass deposited or consumed in electrolysis from charge passed.
Mass deposited is proportional to charge passed and inversely proportional to the electron count per ion. Current efficiency accounts for side reactions such as hydrogen evolution that consume charge without depositing metal. Electroplating thickness is controlled entirely by charge, which is why plating is specified in amp-minutes rather than by current or time alone.
Faraday's Law
m = (Q M) ÷ (z F) × current efficiency, with Q = I t
m = (Q M) ÷ (z F) × current efficiency, with Q = I t Mass deposited is proportional to charge passed and inversely proportional to the electron count per ion. Current efficiency accounts for side reactions such as hydrogen evolution that consume charge without depositing metal.
Electroplating thickness is controlled entirely by charge, which is why plating is specified in amp-minutes rather than by current or time alone.
This calculator takes 5 inputs: Current, Time, Molar mass of the deposited species, Electrons per ion, Current efficiency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.