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Sizing, ROI & Sample Calculators

Free calculators to estimate opportunity size, ROI, and experiment sample sizes for teams, SMEs, researchers, and practitioners.

Sizing, ROI & Sample Calculators

Fast, practical calculators to help you scope opportunities, estimate returns, and plan experiment size so you can prioritize work and run smarter pilots.

Why these calculators matter

Every discovery, experiment, or improvement starts with a simple question: is it worth trying? These calculators turn basic inputs—customers, conversion lifts, price changes, cost savings, or expected effect sizes—into actionable numbers that help you compare ideas, size pilots, and make defensible trade-offs.

What you will understand and accomplish

Using this pack you will be able to:

  • Estimate opportunity size (annualized revenue, cost savings, or user impact) from simple business inputs.
  • Compute expected ROI and payback to rank and prioritize experiments and projects.
  • Plan experiment/sample sizes for A/B tests and pilots so results are reliable without overspending.
  • Document key assumptions and run basic sensitivity checks to see which variables matter most.

Who benefits

These calculators are practical for practitioners and teams in service businesses, skilled trades, small manufacturers, nonprofits, healthcare clinics, product teams, and researchers. For example:

  • A roofing contractor can estimate revenue impact from a new promotion to decide whether to pilot it across two crews.
  • A community clinic can plan sample size for a patient outreach test to ensure valid results before broader rollout.
  • A plant manager can compare the ROI of two reliability interventions and pick the one with faster payback.
  • A product team can size the addressable market and estimate revenue lift from a conversion improvement.

How to use them responsibly

Good numbers don't replace judgment. To reduce the risk of bad decisions:

  • Record assumptions explicitly (traffic, conversion, unit economics) and save them with the calculation.
  • Run sensitivity scenarios (low/expected/high) to see how outcomes change.
  • Prefer modest, evidence-building pilots before full investment; use the sample-size calculator to size those pilots.
  • Use conservative estimates for uncertain inputs and revisit numbers as you collect real data.

What’s included

This free pack includes an Opportunity Sizing & Sample Calculators toolset, a combined Sizing, ROI & Sample Calculators pack, and an ROI & Sample Size calculator you can open, copy, and adapt to your context.

How this fits the Discovery & Innovation Hub

These calculators are practical discovery tools: they help you move from “what is” to “what could be” by turning ideas into comparable metrics and realistic pilots. Use them with experiment templates, hypothesis statements, and evidence capture workflows in the Reusable Tools & Templates Library to build repeatable discovery practice.

Next steps: Try the calculators with one idea, save your assumptions, run low/medium/high scenarios, and plan a small pilot using the suggested sample size. If you need to operationalize results, consider copying this pack into your team domain to adapt and track results over time.

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Start with what you're hungry to improve. As your needs grow, collections can bring together knowledge, audits, forms, dashboards, data, AI, integrations, and other capabilities without requiring you to start from scratch.

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