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The Levich equation

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The Levich equation diagram
The Levich equation models the diffusion and solution flow conditions around a rotating disc electrode. This calc uses it to find the diffusion coefficient of a redox probe.
Levich current
n (electrons)
Electrode area
Kinematic viscosity

Diffusion coefficient
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Typically a Levich plot would be constructed to ensure that the system behaves correctly and to gain better accuracy, but this calc allows a one-point rough calculation. The calc is particularly useful since it allows the entering of inputs in convenient units, when confusing units and their conversion often causes errors in electrochemical calculations.