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Cell Potential Calculator — E°cell = E°cathode − E°anode

A galvanic cell's voltage is the gap between its two half-cell reduction potentials: cathode minus anode, always using reduction potentials for both. A positive result means the cell runs spontaneously.

Cell Potential Calculator — E°cell = E°cathode − E°anode

Ecell∘=Ecathode∘−Eanode∘E^\circ_{cell} = E^\circ_{cathode} - E^\circ_{anode}

How to interpret the result

Worked check: Daniell cell — Cu²⁺/Cu cathode at +0.34 V, Zn²⁺/Zn anode at −0.76 V → E°_cell = 0.34 − (−0.76) = 1.10 V. The classic mistake is flipping the anode's sign; this formula already accounts for it.

Assumptions

  • Standard conditions (1 M, 1 bar, 25 °C)
  • Both potentials are reduction potentials from the same table