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Half-Cell EMF from Standard Reduction Potentials (Nernst) Calculator

Compute standard and actual cell potential via Nernst equation.

Calculates the standard cell potential E°_cell = E°_cathode − E°_anode and corrects for concentration using the Nernst equation: E = E° − (RT/nF)·ln(Q), where R = 8.314 J/mol·K and F = 96485 C/mol.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

V
V

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

E = E° − (0.025693 / n)·ln(Q) at 298 K

In depth

Calculates the standard cell potential E°_cell = E°_cathode − E°_anode and corrects for concentration using the Nernst equation: E = E° − (RT/nF)·ln(Q), where R = 8.314 J/mol·K and F = 96485 C/mol.