TAM SAM SOM Calculator
deanpeters/Product-Manager-Skills
Calculates total, serviceable available and serviceable obtainable market size for a product idea with explicit assumptions, methods and caveats.
Methodology for systematically calculating market size (TAM/SAM/SOM).
Install Tam Sam Som Calculator
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/harness-100 tam-sam-som-calculator --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .claude/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .claude/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculatorType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/harness-100 tam-sam-som-calculator --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .agents/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .agents/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/harness-100 tam-sam-som-calculator --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .cursor/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .cursor/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/revfactory/harness-100.git --path en/44-market-research/.claude/skills/tam-sam-som-calculator--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/harness-100 tam-sam-som-calculator --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .gemini/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .gemini/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install revfactory/harness-100 tam-sam-som-calculatorInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .github/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .github/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/harness-100 tam-sam-som-calculator --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/44-market-research/.claude/skills/tam-sam-som-calculator .opencode/skills/tam-sam-som-calculator && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "tam-sam-som-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/tam-sam-som-calculator into .opencode/skills/tam-sam-som-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tam-sam-som-calculator", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
tam-sam-som-calculator- GitHub stars
- 1.3k
- Token cost
- ~697 tokens
- SKILL.md length
- 87 words
- Files
- 1
- Skills in repo
- 274
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Methodology for systematically calculating market size (TAM/SAM/SOM).
- TAM SAM SOM calculation
- SKILL.md covers Target Agents, Definitions, Top-Down Approach and Bottom-Up Approach, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Market size estimation
What it does
Tam Sam Som Calculator is an agent skill from revfactory/harness-100. Methodology for systematically calculating market size (TAM/SAM/SOM). Use this skill for 'TAM SAM SOM calculation', 'market size estimation', 'market sizing', 'market opportunity analysis', 'addressable market', and other market sizing tasks. Note: purchasing paid market research reports and directly collecting census data are outside the scope of this skill.
Its SKILL.md is about 700 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Product & Project Management, covering Market sizing. The licence is Apache-2.0.
When your agent uses it
- TAM SAM SOM calculation
- Market size estimation
- Market opportunity analysis
- Addressable market
Example prompts
- “TAM SAM SOM calculation”
- “market size estimation”
- “market sizing”
- “/tam-sam-som-calculator”
What it can do on your machine
Read from SKILL.md and the folder at commit 8e8d35c. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Tam Sam Som Calculator loads about 697 tokens when it runs. Until then it costs about 96 tokens; SKILL.md has 87 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 87 words, ~697 tokens.
Download SKILL.mdSave it as
.claude/skills/tam-sam-som-calculator/SKILL.md (or your agent's skills folder).- name
- tam-sam-som-calculator
- description
- Methodology for systematically calculating market size (TAM/SAM/SOM). Use this skill for 'TAM SAM SOM calculation', 'market size estimation', 'market sizing', 'market opportunity analysis', 'addressable market', and other market sizing tasks. Note: purchasing paid market research reports and directly collecting census data are outside the scope of this skill.
TAM SAM SOM Calculator — Market Sizing Methodology
A skill that enhances market sizing for the industry-analyst and research-reviewer.
Target Agents
- industry-analyst — Calculates market size systematically
- research-reviewer — Validates market size calculations
Definitions
TAM (Total Addressable Market):
Total revenue opportunity if 100% market share
"If everyone who could use our product, did"
SAM (Serviceable Addressable Market):
Portion of TAM targeted by your product/service
"Our market segment based on geography, customer type, etc."
SOM (Serviceable Obtainable Market):
Realistic market share you can capture
"What we can actually achieve in 1-3 years"Top-Down Approach
Start with total industry data, narrow down:
TAM = Industry report market size
SAM = TAM x (Target segment %)
SOM = SAM x (Realistic market share %)
Example:
TAM: Global CRM market = $80B
SAM: SMB CRM in North America = $80B x 15% x 40% = $4.8B
SOM: Year 3 target = $4.8B x 0.5% = $24MBottom-Up Approach
Start with unit economics, scale up:
SOM = Target customers x Revenue per customer
SAM = Total addressable customers x Revenue per customer
TAM = Total potential customers globally x Revenue per customer
Example:
SOM: 500 customers x $2,000/yr = $1M
SAM: 50,000 potential SMBs x $2,000/yr = $100M
TAM: 2M potential businesses globally x $2,000/yr = $4BCross-Validation
Compare Top-Down and Bottom-Up results:
- If within 2x of each other: Good convergence
- If >3x difference: Review assumptions
- Present both with reasoningData Sources
| Source Type | Examples | Best For |
|---|---|---|
| Industry reports | Gartner, IDC, Statista, Grand View Research | TAM |
| Government data | Census, trade statistics, economic indicators | Market sizing |
| Company filings | SEC filings, annual reports | Competitor sizing |
| App/web analytics | App Annie, SimilarWeb, Alexa | Digital market estimation |
| Job postings | LinkedIn, Indeed | Market growth signals |
Common Mistakes
1. TAM too large ("the whole internet")
2. Confusing TAM with SAM (not everyone is your customer)
3. SOM too aggressive (>5% in year 1 for new market)
4. No sources cited
5. Static analysis (no growth rate consideration)
6. Not accounting for pricing differences across segments© revfactory, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in en/44-market-research/.claude/skills/tam-sam-som-calculator of revfactory/harness-100.
Open the folder on GitHubat commit 8e8d35c
Compare with similar skills
Tam Sam Som Calculator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Tam Sam Som Calculator this skillrevfactory/harness-100 | 1.3k | — | ~697 | Automated safety check: Pass | Apache-2.0 | |
| TAM SAM SOM Calculatordeanpeters/Product-Manager-Skills | 7.2k | 1 repos | ~4.8k | Automated safety check: Pass | Custom licence | |
| Market Sizing Analysisnicepkg/auto-company | 195 | 11 repos | ~3.1k | Automated safety check: Pass | None | |
| Management ConsultantDogInfantry/claude-skill-management-consultant-B1 | 136 | — | ~14k | Automated safety check: Pass | Custom licence | |
| Competitor MapperMaxKmet/idea-validation-agents | 478 | — | ~3.3k | Automated safety check: Pass | MIT | |
| Market Sizing Frameworksslgoodrich/agents | 139 | — | ~3.3k | Automated safety check: Pass | Custom licence |
Similar skills
Market Sizing Analysis
nicepkg/auto-company
This skill should be used when the user asks to "calculate TAM", "determine SAM", "estimate SOM", "size the market", "calculate market opportunity", "what's the total addressable market", or…
Management Consultant
DogInfantry/claude-skill-management-consultant-B1
MBB-level management consultant with mastery over structured thinking, frameworks, guesstimation, industry analysis, and executive-grade deliverables.
Competitor Mapper
MaxKmet/idea-validation-agents
Maps the full competitive landscape — direct, indirect, substitute, and emerging competitors — with positioning gap analysis, review mining, and marketinsights-calibrated saturation scoring.
Market Sizing Frameworks
slgoodrich/agents
TAM/SAM/SOM calculations and market sizing methodologies. An agent skill from slgoodrich/agents.
Market Sizing
AlphaMao1/AlphaMao_Skills
市场规模测算工具 (TAM/SAM/SOM)。适用于用户提到「市场规模」「market size」「TAM」「SAM」「SOM」或需要估算目标市场大小时使用。
More from revfactory/harness-100
All 96 skills in this repoAnti Bot Analyzer
revfactory/harness-100
A skill for analyzing website anti-bot defense mechanisms and developing legitimate evasion strategies.
API Error Design Patterns
revfactory/harness-100
Reference for designing how an API reports failures: structured error codes, response shapes, client-friendly messages, an error catalog and retry or fallback advice.
API Security Checklist
revfactory/harness-100
Walks a backend-dev agent through OWASP API Top 10 checks, authentication and authorization patterns, and defense code during API design.
Arg Parser Generator
revfactory/harness-100
Methodology for systematically designing and generating CLI tool argument parser structures.
Audience Segmentation
revfactory/harness-100
Audience segmentation skill used by the analyst and curator agents.
Audio Storytelling
revfactory/harness-100
Audio storytelling skill used by the podcast scriptwriter and show note editor.
Related
Categories
Questions about Tam Sam Som Calculator
What does Tam Sam Som Calculator do?
Methodology for systematically calculating market size (TAM/SAM/SOM). Tam Sam Som Calculator is an agent skill from revfactory/harness-100. Methodology for systematically calculating market size (TAM/SAM/SOM).
When should I use Tam Sam Som Calculator?
Tam Sam Som Calculator fits situations like: TAM SAM SOM calculation; market size estimation; market opportunity analysis; addressable market.
How do I install Tam Sam Som Calculator in Claude Code?
Run `npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a claude-code`. Or copy the skill folder (en/44-market-research/.claude/skills/tam-sam-som-calculator in revfactory/harness-100) into .claude/skills/tam-sam-som-calculator in your project. Claude Code loads it when a task matches its description.
How do I install Tam Sam Som Calculator in Codex?
Run `npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a codex`. Or copy the skill folder (en/44-market-research/.claude/skills/tam-sam-som-calculator in revfactory/harness-100) into .agents/skills/tam-sam-som-calculator in your project. Codex loads it when a task matches its description.
Can I use Tam Sam Som Calculator in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add revfactory/harness-100 --skill tam-sam-som-calculator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tam-sam-som-calculator, .gemini/skills/tam-sam-som-calculator, .github/skills/tam-sam-som-calculator and .opencode/skills/tam-sam-som-calculator in your project.
What does Tam Sam Som Calculator need to run?
SKILL.md names no scripts, command-line tools or credentials: Tam Sam Som Calculator is instructions for the agent only.
Does Tam Sam Som Calculator access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Tam Sam Som Calculator safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Tam Sam Som Calculator use?
Tam Sam Som Calculator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tam Sam Som Calculator use?
About 697 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Tam Sam Som Calculator?
Skills that share tags, products or a category with Tam Sam Som Calculator: TAM SAM SOM Calculator (deanpeters/Product-Manager-Skills, 7.2k stars), Market Sizing Analysis (nicepkg/auto-company, 195 stars), Management Consultant (DogInfantry/claude-skill-management-consultant-B1, 136 stars) and Competitor Mapper (MaxKmet/idea-validation-agents, 478 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tam Sam Som Calculator?
revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,295 GitHub stars. The repository holds 274 skills in this directory. The repository was last updated on March 22, 2026.
Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.