Membrane Potential Calculator

Calculate membrane potential using Nernst or Goldman-Hodgkin-Katz equations

Calculation Method

Temperature (K)

Ion

[Inside] (mM)

[Outside] (mM)

Resting potential: -70 to -90 mV (neurons)

Action potential peak: +30 to +40 mV

At rest, the membrane is most permeable to K+, so Vm is close to EK.

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Chemistry: The Central Science

by Brown, LeMay, Bursten

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.