Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Cathode reduction potential (V)

Required number input.

Anode reduction potential (V)

Required number input.

Compute the cell potential as the cathode reduction potential minus the anode reduction potential. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Cell potential (V)

The resulting cell potential returned as a number.

• Electrochemical relationships require consistent sign conventions, electron stoichiometry, electrode area, standard state, and temperature. Overpotential, internal resistance, mass transfer, side reactions, and non-unit activities are not automatically included.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Standard Cell Potential

  Compute E°cell = E°cathode(reduction) - E°anode(reduction) from tabulated standard reduction potentials.

• Nernst Equation Calculator

  Compute cell potential as the standard potential minus 0.0592 over electron count times log10 of the reaction quotient.

• Cell Potential From Gibbs Calculator

  Convert Gibbs free energy change to cell potential via E° = −ΔG/(nF).