Free CRO tools and calculators

Access a complete suite of free conversion rate optimisation tools. Calculate ROI, plan A/B tests, check significance, map customer journeys, and audit your UX. All free, no account required.

Available Free Tools

• Conversion Rate Calculator: Enter traffic, conversions and order value to see your conversion rate, what each percentage point is worth, and the revenue impact of a target rate.
• CRO ROI Calculator: See what a 1% conversion uplift is worth in annual revenue from your monthly traffic, conversion rate and average order value.
• A/B Test Prioritisation Planner: Rank your test ideas by weekly conversion volume and time to significance so you run the tests that can actually conclude.
• A/B Test Sample Size Calculator: Visitors per variant needed to detect a given uplift at 95% significance and 80% power, from your baseline rate and minimum detectable effect.
• A/B Test Duration Calculator: How many whole weeks a test needs at your traffic level to reach the required sample size.
• A/B Test Significance Calculator: Two-proportion z-test on finished test results: rates, relative uplift, p-value, confidence and a confidence interval on the uplift.
• Revenue Per Visitor Calculator: Compare variants on revenue per visitor, conversion rate and average order value, the primary metric for ecommerce tests.
• CRO Checklist: Work through the conversion checks that matter on landing pages, forms and ecommerce pages, and track what you have covered.
• Customer Journey Mapper: Map each stage of your funnel by goal, pain point and audience, and get stage-by-stage recommendations for where visitors drop off.
• UX Audit Suite: AI critique of one page across first impression, navigation, copy, trust, conversion psychology and checkout, with suggested rewrites.

Why These Tools Are Free

We believe every business should have access to professional CRO methodology, not just companies that can afford expensive consultants. These tools are free forever. Run a full AI conversion audit to get automated, scored analysis of your specific website.

Read our CRO blog for expert guidance on using these tools effectively. For unlimited AI-powered analysis, see Conversion Score Pro.