SampleSize AI

Calculate required sample sizes for experiments with multiple metrics and variants

Data & AnalyticsFree

SampleSize AI calculates required sample sizes for A/B tests and experiments considering multiple primary and guardrail metrics, multiple treatment variants, sequential testing plans, and stratification. The tool accounts for metric variance from historical data, applies multiple comparison corrections, and estimates calendar time to reach significance at projected traffic levels. It identifies when requested minimum detectable effects are unrealistically small for the available traffic, preventing teams from launching experiments that cannot produce conclusive results.

Key Features

• ✓Multi-metric power analysis
• ✓Sequential testing planning
• ✓Traffic-based duration estimation
• ✓Feasibility assessment
• ✓Stratification support