Tam Sam Som Calculator
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.
Install
npx skills add deanpeters/Product-Manager-Skills --skill tam-sam-som-calculatorgit clone --depth 1 https://github.com/deanpeters/Product-Manager-Skills.git /tmp/Product-Manager-Skills
mkdir -p ~/.claude/skills
cp -r /tmp/Product-Manager-Skills/skills/tam-sam-som-calculator ~/.claude/skills/tam-sam-som-calculatorPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
## 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. Use it and skip whatever it covers; don't re-ask. **Arriving empty-handed? That works too.** The calculator opens by asking what you're sizing and for whom, then works through method and assumptions. **Three entry modes** — pick whichever matches where your evidence lives: 1. **Bring your own numbers** — you have population and ARPU figures; jump to the math (the helper script makes this deterministic)
Details
- Skill name
tam-sam-som-calculator- Repository
- deanpeters/Product-Manager-Skills
- Path
skills/tam-sam-som-calculator/SKILL.md- Repo updated
- 16 October 2026
FAQ
What does the Tam Sam Som Calculator skill do?
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.
How do I install the Tam Sam Som Calculator skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add deanpeters/Product-Manager-Skills --skill tam-sam-som-calculator. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Tam Sam Som Calculator popular?
It lives in deanpeters/Product-Manager-Skills, which has 7,800 GitHub stars and 940 forks, and is included in 3 curated skill lists.
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