Nernst Equation Calculator — E = E° − (0.0592/n)logQ

Real cells rarely sit at standard conditions. The Nernst equation corrects E° for the actual reaction quotient Q — as products build up, the voltage sags. This 25 °C form uses the handy 0.0592 V factor.

Nernst Equation Calculator — E = E° − (0.0592/n)logQ

$E = E^\circ - \frac{0.0592}{n}\log_{10}Q$

Solve for

Standard cell potential (E°)

Unit

Electrons transferred (n)

Unit

Reaction quotient (Q)

Unit

Result unit

How to interpret the result

Worked check: Daniell cell E° = 1.10 V, n = 2, Q = 10 → E = 1.10 − (0.0592/2)(1) = 1.070 V. Tenfold more products cost about 30 mV here.

Assumptions

Temperature is 25 °C (298 K) — the 0.0592 factor is T-specific
Q uses activities approximated by concentrations