Electrochemical Cell Calculator
Calculate cell voltage, capacity and energy for a practical electrochemical cell.
About Electrochemical Cell Calculator
One mole of electrons carries 96,485 coulombs, so capacity follows directly from moles of reactant and electron count. Dividing by 3,600 converts coulombs to the amp-hours batteries are rated in. Theoretical capacity sets the ceiling for any chemistry, and practical cells reach only 80 to 90 per cent of it because of inactive mass and internal resistance.
Formula
Electrochemical Cell
Charge = nFm; energy = charge × voltage; capacity in Ah = charge ÷ 3,600
- F
- Faraday constant, the charge on one mole of electrons
Worked example
With the default values below, Electrochemical Cell Calculator returns Theoretical Energy of 106.134. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Cell potentialminimum 0 V
- 1.1 V
- Electrons transferred per formula unitaccepts 1–10
- 2
- Moles of limiting reactantminimum 0 mol
- 0.5 mol
- Practical efficiencyaccepts 0–100 %
- 85 %
Results
- Theoretical Energy
- 106.134 kJ
- Usable Energy
- 25.0593 Wh
- Total Charge Available
- 96,485.0 C
- Capacity
- 26.8014 Ah
- Energy per Mole of Reactant
- 212.2670 kJ/mol
Step by step
- 1Values used
- 2Electrochemical Cell
- 3Theoretical Energy= 106.134 kJ
- 4Usable Energy= 25.0593 Wh
- 5Total Charge Available= 96,485.0 C
- 6Capacity= 26.8014 Ah
- 7Energy per Mole of Reactant= 212.2670 kJ/mol
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Electrochemical Cell calculated?
Charge = nFm; energy = charge × voltage; capacity in Ah = charge ÷ 3,600 One mole of electrons carries 96,485 coulombs, so capacity follows directly from moles of reactant and electron count. Dividing by 3,600 converts coulombs to the amp-hours batteries are rated in.
Why does Electrochemical Cell matter?
Theoretical capacity sets the ceiling for any chemistry, and practical cells reach only 80 to 90 per cent of it because of inactive mass and internal resistance.
What values do I need to enter?
This calculator takes 4 inputs: Cell potential, Electrons transferred per formula unit, Moles of limiting reactant, Practical efficiency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.