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

Standard cathode reduction potential (V)

Required number input.

Standard anode reduction potential (V)

Required number input.

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

Standard cell potential (V)

The resulting standard 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.

• Cell Potential Calculator

  Compute the cell potential as the cathode reduction potential minus the anode reduction potential.

• Log K From Cell Potential

  Compute the base-10 logarithm of the equilibrium constant as electron count times standard cell potential divided by 0.0592.

• Nernst Equation Calculator

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