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

ΔG (J)

Gibbs free energy change in joules.

Electrons transferred

Electrons transferred per mole of reaction; must be nonzero.

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

Cell potential in volts.

• 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.

• Gibbs Free Energy From Cell Potential Calculator

  Convert cell potential to Gibbs free energy via ΔG = −nFE with F = 96485 C/mol.

• Delta G From K

  Compute Gibbs free energy change in kJ per mole from the equilibrium constant as -R times T times ln(K).

• Gibbs-Helmholtz Calculator

  Compute the Gibbs free energy change as ΔG = ΔH − T·ΔS.