Tam Sam Som Calculator
deanpeters/product-manager-skillsMarket sizing helps you decide if a product idea is worth pursuing. This tool guides you through calculating three key numbers TAM, SAM, and SOM. Each number shows a different slice of the market from the biggest possible audience to the customers you can realistically reach.
Product managers use this when building business cases or pitching to investors. The questions adapt based on your answers and include real data sources like census reports or economic projections. You get a defensible estimate that stands up to tough questions.
This is not a guess. It is a structured method that adds credibility to your market size. After using it you will have numbers you can back up with citations.
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