Where does this skill get its market data?

The skill uses a citation-backed approach, referencing authoritative sources such as the US Census Bureau, World Bank, Statista, and IMF to provide credible estimates.

What is the TAM/SAM/SOM framework?

It is a three-tier model used to estimate market size: TAM is the total demand, SAM is the portion you can target, and SOM is the segment you can realistically capture in the short term.

Does it provide the actual revenue calculations?

Yes, it includes a deterministic Python helper script that calculates market totals based on your population, ARPU (Average Revenue Per User), and market share assumptions.

Can I use this for niche B2B software products?

Yes, the skill uses adaptive questioning that allows you to specify firmographics like employee count and industry vertical to calculate precise SAM and SOM values.

TAM/SAM/SOM Market Sizing Calculator

Name: TAM/SAM/SOM Market Sizing Calculator
Author: deanpeters

bydeanpeters

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3,761

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Productivity & Workflow

Calculates defensible market size estimates using adaptive questioning and real-world data citations for business cases and investor pitches.

The TAM/SAM/SOM Market Sizing Calculator is a specialized framework designed for product managers and founders to transform vague market guesses into structured, defensible analysis. By guiding users through a 4-step adaptive session—defining problem spaces, geographic regions, industry segments, and customer firmographics—it builds a comprehensive view of the Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM). The skill incorporates real-world citations from sources like the US Census and Statista, and includes a deterministic math script to ensure revenue projections are grounded in mathematical reality rather than just optimistic estimates.

Key Features

01Automated generation of structured Markdown reports with validation checks

02Adaptive 4-step interactive questioning tailored to B2B or B2C contexts

03Citation-backed methodology using global economic and population data

04Standardized market sizing framework (TAM/SAM/SOM) for executive reviews

053,761 GitHub stars

06Deterministic math helper script for calculating revenue and market share

Use Cases

01Building market sizing slides for venture capital pitches or internal budget requests

02Validating the commercial viability of a new product idea during discovery

03Prioritizing different market segments based on realistic capture potential

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add deanpeters/product-manager-skills tam-sam-som-calculator

For use in Claude.ai and ChatGPT

Key Features

01Automated generation of structured Markdown reports with validation checks

02Adaptive 4-step interactive questioning tailored to B2B or B2C contexts

03Citation-backed methodology using global economic and population data

04Standardized market sizing framework (TAM/SAM/SOM) for executive reviews

053,761 GitHub stars

06Deterministic math helper script for calculating revenue and market share

Use Cases

01Building market sizing slides for venture capital pitches or internal budget requests

02Validating the commercial viability of a new product idea during discovery

03Prioritizing different market segments based on realistic capture potential