How this calculation works
Approximate two-sided two-proportion sample size at 95% confidence and 80% power; excludes sequential testing corrections.
Worked starting inputs
Example inputs: Baseline Conversion Pct = 5.0, Minimum Lift Pct = 20.0. Expected result: Estimated visitors per variant: 16,298, Variant target conversion: 6%. These are illustrative numbers, not market rates. Change a value to compare scenarios; download the result if useful.
Assumptions and limitations
Manual estimates depend on your data and assumptions.
Every result depends on the entered values. The tool does not fetch marketplace fees, infer current exchange rates or verify supplier policies. It is informational, not tax or financial advice.