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Statistics & Experiments
Sample Size — A/B conversion lift (power 0.85, α 0.01)
Estimate required sample size for a/b conversion lift at power 0.85 and alpha 0.01.
Runs in your browser by default — private, fast, and ready to export.
How to use, examples & FAQShowHide
How to use
- Review baseline and lift
- Compute required n
- Export for experiment brief
Example
A/B conversion lift · p=0.3 · lift=0.3
Benefits
- Transparent assumptions
- CSV export
- Power/alpha presets
FAQ
Is this a substitute for a statistician?
No. It is a planning estimate. Validate with your methodology and traffic constraints.
Educational statistical estimate only — not a guarantee of experiment success.
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Statistics
Sample Size — A/B conversion lift (power 0.8, α 0.01)
Estimate required sample size for a/b conversion lift at power 0.8 and alpha 0.01.
Advanced
Open