Nernst Equation Non-Standard Cell Potential Calculator

Calculate the actual electromotive force (E) of an electrochemical cell under non-standard concentrations and temperatures.

Input Parameters

Instant Real-time Calculation

Standard Cell Potential (E° in Volts)

Moles of Electrons Transferred (n)

Reaction Quotient (Q = [Products] / [Reactants])

Result Chemistry

Non-Standard Cell Potential (E)

-- Volts (V)

Export calculation:

Calculation Logic:

Modifies standard reduction potentials for real-world operating conditions, demonstrating how battery voltage declines as reactants are consumed and Q approaches equilibrium.

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Understanding Nernst Equation Non-Standard Cell Potential Calculator & Formula

Mathematical Formula: E = E° - (0.05916 / n) × log10(Q) at 298.15 K

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Nernst Cell Potential Shift Examples (n = 2 at 25°C)

Reaction Quotient Q	log10(Q)	Nernst Correction Term	Resulting E (Daniell E° = 1.10 V)
Q = 0.001 (10⁻³)	-3	+0.089 V	1.189 V (Higher Voltage)
Q = 1.0 (Standard)	0	0.000 V	1.100 V (Standard Potential)
Q = 1,000 (10³)	+3	-0.089 V	1.011 V (Voltage Drops)
Q = K_eq	log(K)	-E°	0.000 V (Dead Battery / Equilibrium)

How to Use the Nernst Equation Non-Standard Cell Potential Calculator

1 Input standard cell potential E° in Volts.
2 Enter number of electrons transferred in balanced redox equation (n).
3 Input reaction quotient Q.
4 Read non-standard voltage E.

FAQ & Help 1 question