tam-sam-som-calculator

Calculate TAM, SAM, and SOM with citations and Year 1-3 projections.

6.4k|767|Updated Feb 5, 2026

Search Tags:#GTM #TAM #SAM #SOM #product-management #market-sizing #data-backed

Ready to run

npx skills add https://github.com/deanpeters/Product-Manager-Skills --skill tam-sam-som-calculator

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: tam-sam-som-calculator
Source: https://github.com/deanpeters/Product-Manager-Skills/tree/main/skills/tam-sam-som-calculator
Command: npx skills add https://github.com/deanpeters/Product-Manager-Skills --skill tam-sam-som-calculator

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill guides product teams through structured market sizing by computing TAM, SAM, and SOM for a product idea, with citations and transparent assumptions.

Core Features & Use Cases

Adaptive questioning: Collects context and custom data to tailor the market sizing calculations.
Citation-backed outputs: Produces defensible market size estimates with sources and scenario assumptions.
Three-year planning: Generates Year 1–3 projections and actionable SOM targets to inform GTM.

Quick Start

Run the skill and answer the prompts to input your product idea, target region, industry segments, and customer profiles. The tool will output a structured TAM/SAM/SOM analysis with data sources and assumptions.

Frequently Asked Questions about tam-sam-som-calculator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I calculate TAM, SAM, and SOM for a new product idea?▼

Calculating TAM, SAM, and SOM requires defining your target region, industry segments, and customer profiles; this tool uses adaptive prompts to generate citation-backed estimates with Year 1-3 projections.

What is the best way to build a defensible market sizing analysis for a startup pitch?▼

A defensible market sizing analysis requires transparent assumptions and cited data sources; this tool produces a structured Markdown report detailing sources, assumptions, and actionable SOM targets for early-stage GTM planning.

Can I generate three-year market projections without connecting external data sources?▼

Yes, you can generate three-year market projections without external data access; the tool uses built-in market data templates and adaptive questioning to produce Year 1-3 forecasts and SOM targets.

Does this market sizing tool support early-stage GTM planning for specific industry segments?▼

Yes, this tool supports early-stage GTM planning by tailoring TAM, SAM, and SOM calculations to specific industry segments and customer profiles, outputting actionable targets to inform your go-to-market strategy.

How are data sources and assumptions handled in a TAM SAM SOM analysis?▼

Data sources and assumptions are explicitly documented in the output; the tool produces a structured Markdown report that transparently lists the citations and scenario assumptions used to derive your market size estimates.