# tam-sam-som-calculator

> Claude/Codex skill by [@deanpeters](https://omgskills.com/library/deanpeters/index.md) · 7.5k stars · Updated 2026-10-16

Calculate TAM, SAM, and SOM with explicit assumptions, methods, and caveats. Use when sizing a market for a product idea, business case, or executive review.

Tags: ai-agents, ai-product-management, claude-skills, pm-frameworks, product-management

## Install

```sh
git clone https://github.com/deanpeters/Product-Manager-Skills /tmp/Product-Manager-Skills && ln -s /tmp/Product-Manager-Skills/skills/tam-sam-som-calculator ~/.claude/skills/tam-sam-som-calculator
```

## From README

Purpose Guide product managers through calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for a product idea by asking adaptive, contextually relevant questions. Use this to build defensible market size estimates backed by real-world citations, economic projections, and population data—essential for pitching to investors, securing budget, or validating product-market fit. This is not a back-of-napkin guess—it's a structured, citation-backed analysis that withstands scrutiny. Input Works best with: The product or idea being sized, and any market constraints you already know (geography, vertical, customer type). Also useful: Pricing assumptions, comparable companies, and the audience for the numbers (investors, execs, business case). Anything supplied with the invocation itself — text after the skill name, a pasted context dump, or an appended ARGUMENTS: line — counts as answers already given.

## Links

- HTML page: https://omgskills.com/skills/deanpeters/product-manager-skills/tam-sam-som-calculator/
- GitHub: https://github.com/deanpeters/Product-Manager-Skills
- Author: [@deanpeters](https://omgskills.com/library/deanpeters/index.md)

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