Free A/B Test Planner: Plan & Prioritise Your CRO Tests

Plan A/B tests properly before you run them. Calculate the sample size you need for statistical significance, estimate how long your test will take, and prioritise experiments by expected impact and effort.

What the Planner Calculates

• Required sample size per variation for 95% statistical confidence
• Estimated test duration based on your current traffic volume
• Minimum detectable effect at your traffic level
• Priority score based on impact, confidence, and ease of implementation

Not sure what to test first? Run a free AI audit to identify your highest-impact conversion opportunities, then use this planner to size and prioritise those experiments.

Not sure whether to test or audit first? Read should you buy an AI website audit or hire an agency to understand when each approach is the right choice, and what a six pillar conversion audit covers so you know what to test in the first place. Upgrade to Pro for unlimited AI audits that tell you exactly what to test. Explore all free CRO tools.