What this calculator does
Nernst equation (cell potential) works out cell potential under non-standard conditions from the standard potential and reaction quotient. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
The inputs explained
| Field | What to enter |
|---|---|
| Standard cell potential E° (V) | A number, measured in V. Starts at 1.1. |
| Electrons transferred (n) | A number. Starts at 2. |
| Reaction quotient Q | A number. Starts at 0.05. |
| Temperature (K) | A number, measured in K. Starts at 298.15. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with standard cell potential e°
Every other input is held at the calculator’s starting values while standard cell potential e° varies. Select any row to load that scenario into the calculator.