CRO Tools & Calculators
Practical tools we use to plan tests, forecast upside, prioritise opportunities, and keep measurement clean.
Everything here is directional — the goal is faster, more consistent decision-making (not false precision).
Not sure which tool to use?
- Finding what to optimise next → Use the CRO Opportunity Finder
- Choosing the right success metrics → Use the Metrics Picker (Primary + Guardrails)
- Planning a test → Use the A/B Test Duration & Sample Size calculator
- Sizing upside before you build → Use the Conversion Lift Forecast calculator
- Already have a winning result → Use the CRO ROI (Winning Test Results) calculator
- Building a CRO business case → Use the CRO Program ROI calculator
CRO Opportunity Finder
Quickly size and rank optimisation opportunities across your funnel to find the highest-impact place to start.
Best for: backlog triage & focus
Metrics Picker (Primary + Guardrails)
Pick a clear primary metric and the right guardrails to avoid false wins and protect user experience.
Best for: clean experiment measurement
A/B Test Duration & Sample Size Calculator
Estimate sample size and how long your A/B test needs to run based on baseline CVR, expected lift, and daily traffic.
Best for: planning & stakeholder expectations
Conversion Lift Forecast Calculator (Revenue & Profit)
Model incremental revenue and profit from a conversion lift using sessions, CVR, AOV, and gross margin — with a 12-month view.
Best for: sizing upside before build
CRO ROI Calculator (Winning Test Results)
Translate observed uplift from a completed experiment into estimated monthly and yearly value (revenue + profit).
Best for: valuing winners & rollout cases
CRO Program ROI Calculator
Model compounding month-by-month improvements vs CRO cost, including profit and running ROI over a year.
Best for: budgeting & business cases
Want a second set of eyes?
If you share your funnel entry volume, baseline conversion rate, and AOV, we can sanity-check assumptions and recommend the fastest path to impact.