Free calculators and interactive tools from Experimento.
Free A/B test sample size calculator. Enter your baseline conversion rate and the smallest lift worth detecting to get the visitors per variation you need for a valid test.
Free A/B test significance calculator. Enter visitors and conversions for your control and variant to get the p-value, confidence level, and whether the result is statistically significant.
Free A/B test duration calculator. Enter your traffic, baseline conversion rate, and target lift to find out how many days your A/B test needs to run to reach significance.
Free CRO ROI calculator. Enter your traffic, conversion rate, and average order value to see the extra monthly and annual revenue a conversion rate improvement would generate.
A practical UK guide to running a user experience audit: heuristics, severity scoring, UK cost and accessibility law, and how to act on the findings.
A practical UK guide to electronic product design and development: real stage costs, timelines, CE/UKCA rules, firmware budgets, DFM and tool choices.
What is UX research? A practical guide to the main user research methods, when to use each, the tools involved, and how to pick the right one for your question.
How SEO and user experience work together in 2026, from Core Web Vitals and page experience to the on-page UX signals that quietly move rankings.
What is digital product design, the stages of the process, and how a product designer differs from a UX designer. A practical guide for teams building software.
A practical guide to UX designer jobs in the UK: realistic salaries by level, where to find roles, what hiring managers want in 2026 and how to stand out.
Augmented reality testing explained: the QA methods, real challenges and tools teams use to test AR and VR products that work in the real world.
Inclusive design examples and the principles behind them: recognise exclusion, learn from diversity, and solve for one to extend to many, with real cases.
How to build a career as a UX designer: the skills that matter, degree vs bootcamp routes, portfolio steps and realistic UK salaries at each level.
What is user experience? A plain-English introduction to UX, how it differs from usability and UI, the ISO definition, and how teams design it deliberately.
A practical guide to product designer jobs: what the role covers, the skills and portfolio employers want, realistic UK salaries and where to actually apply.
What a user experience manager does day to day, the skills employers screen for, realistic UK salaries, and how to progress to head of UX.
A practical guide to user researcher jobs in the UK: how to get in without experience, the skills and portfolio employers want, and realistic 2026 salaries.
A realistic guide to product tester jobs in the UK: the legit consumer panels, paid software and usability testing gigs, what you earn, and how to spot scams.
A practical mobile app testing guide: the test pyramid, choosing between Appium, Espresso and XCUITest, real devices vs emulators, and the Play Store gate.
A practical visual regression testing guide: how it works, the 2026 tools that matter, how to cut false positives, and where to fit it in your pipeline.
Manual testing vs automated testing in software testing, when each pays off, and how to split your effort so quality goes up and costs come down.
Software testing methodologies compared without the glossary: how Waterfall, Agile, V-model and shift-left actually differ, and how to choose by release cadence.
What is interaction design (IxD)? A clear definition, the five dimensions, core principles, and how it differs from UX and UI design.
Free minimum detectable effect (MDE) calculator. Enter the visitors per variation you can realistically get and your baseline conversion rate to find the smallest lift an A/B test can reliably detect.
Free ICE score calculator. Rate each experiment idea on Impact, Confidence and Ease, then rank your A/B test backlog so you always run the test with the best payoff first.
Free sample ratio mismatch (SRM) calculator. Enter the users each A/B test variant received and get a chi-square check that tells you whether the split is broken and the result should be thrown out.
A step-by-step guide to writing a design brief, including a full design brief example, a free template, and the sections that stop projects going sideways.
A practical guide to performance testing services, stress testing, load and soak tests: when to run each, the metrics that matter, and the tools teams use.