# A/B Test Calculator

*Artisan Strategies — https://www.artisangrowthstrategies.com/tools/ab-test-calculator*

Plan experiments: baseline conversion, minimum detectable effect (MDE), power, and sample size per variant.

## Method

1. Set baseline conversion rate  
2. Set MDE (relative or absolute lift you care about)  
3. Choose power (e.g. 80%) and significance (e.g. 95%)  
4. Compute required sample per variant  

## Worked example (illustrative)

| Input | Value |
|-------|------:|
| Baseline CVR | 5% |
| MDE (relative) | 20% (to 6%) |
| Power / α | 80% / 5% |
| **Sample / variant (order of magnitude)** | **thousands of users** — use the interactive tool for exact n |

Treat outputs as planning aids, not guarantees. Guardrails matter more than p-values alone.