Sample Size Calculator for Marketers

Plan your next A/B test with confidence. This tool helps you calculate the minimum sample size needed to detect a meaningful effect, based on your campaign's baseline and target lift.

Baseline conversion rate (%)

Minimum detectable effect (%)

Confidence level (%)

Power (%)

Control group share (%)

Variant group share (%)

MDE is relative to baseline

Alternative hypothesis

Talk to a marketing data expert to refine your approach.

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