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Nernst Equation Calculator

Cell potential under non-standard conditions (25 °C).

Compute the actual cell potential E from the standard potential E°, the number of electrons transferred n, and the reaction quotient Q at 25 °C.

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

Inputs

V

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° − (0.0257 / n) · ln(Q) (at 25 °C, in volts)

In depth

Compute the actual cell potential E from the standard potential E°, the number of electrons transferred n, and the reaction quotient Q at 25 °C.