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tam-sam-som-calculator

Guide structured TAM, SAM, and SOM market sizing with adaptive questions and optional calculations.

358|11|Updated May 15, 2026
Search Tags:#product strategy#assumptions#market sizing#sam#som#tam#citation-ready
One-click install
npx skills add https://github.com/getcrew44/crew44 --skill tam-sam-som-calculator-getcrew44
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: tam-sam-som-calculator
Source: https://github.com/getcrew44/crew44/tree/main/daemon/internal/presets/defaultcrew/skills/product/tam-sam-som-calculator
Command: npx skills add https://github.com/getcrew44/crew44 --skill tam-sam-som-calculator-getcrew44

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

It helps product teams produce defensible market size estimates by structuring how to calculate Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) with explicit assumptions and citations-ready prompts.

Core Features & Use Cases

  • Guided market sizing interviews: Asks up to four adaptive questions to define problem space, geography, segments, and target customers.
  • TAM → SAM → SOM reasoning: Translates answers into structured estimates that reflect reachability and realistic capture windows (typically 1–3 years).
  • Assumptions and validation guardrails: Includes anti-patterns and validation checks to reduce hand-wavy conclusions during executive or investor reviews.
  • Deterministic math helper (optional): Supports calculating TAM/SAM/SOM from supplied population, ARPU, and shares without network access.

Quick Start

Ask the skill to calculate TAM, SAM, and SOM for your product idea by sharing your website copy or a competitor description, then selecting the offered options for problem space, region, segment, and target customers.

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 my product idea?▼

To calculate TAM, SAM, and SOM, this skill guides you through adaptive questions defining your problem space, geography, and customer segments, then translates your answers into structured market size estimates using a deterministic math helper.

What is the best way to build defensible market sizing assumptions for an investor pitch?▼

Defensible market sizing requires structured assumptions with citation-backed prompts and validation guardrails, translating TAM into SAM and SOM to reflect realistic capture windows and avoid hand-wavy conclusions during executive reviews.

Can I size B2B and B2C markets using ARPU and population data without network access?▼

Yes, you can size B2B and B2C markets offline using the deterministic math helper, which calculates TAM, SAM, and SOM from supplied population, ARPU, and share data without requiring network access.

How do market sizing calculators handle realistic capture windows for SOM?▼

Market sizing calculators handle SOM by applying share-based rollups to your defined customer segments, estimating realistic capture windows typically spanning one to three years based on your structured assumptions.

Why do my TAM to SOM rollups lack validation during executive reviews?▼

TAM to SOM rollups often lack validation due to hand-wavy conclusions, which this skill mitigates by applying anti-pattern checks and validation guardrails to ensure your market sizing assumptions are explicit and citation-ready.

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