ICP Intelligence report
TAM SAM SOM Calculator: your result
This answer uses a made up example company. Change the details above and press Run to see your own result.
TAM SAM SOM Calculator
Free bottom up TAM SAM SOM calculator for B2B
For founders and CMOs preparing a board or investor deck. The decision: how big is our market, counted bottom up?
Enter how many companies could buy and your average contract value in dollars, and get TAM, SAM and SOM worked out bottom up, with the assumptions shown and a summary for your investor deck. It is free, with no sign in.
Can our B2B market support our revenue target using bottom-up TAM, SAM, and SOM?
Test whether your market supports your revenue target with the bottom-up formula: multiply total potential companies by average contract value for TAM, multiply TAM by your ICP match rate for SAM (default example 30%), and multiply SAM by your Year 1 market share target for SOM (default example 3%), then check deals needed, monthly target, and required pipeline in TAM/SAM/SOM Calculator.
What you get
This sample is a made up example, built from the inputs behind Fill in an example. It shows one section of the answer.
Investor-Ready Summary
The indian mid-size companies with an ERP segment represents a $216.0M TAM with $64.8M SAM of companies matching our ICP.
At the example Year 1 share of 3.0%, the calculation gives $1.9M SOM, requiring 81 customers at $24K ACV.
This scenario does not establish attainable market share. Figures calculated from your inputs, plus the preset rates marked as examples above.
Next Step: Use Lookalike Signal Generator to create targeting criteria
See the full example answer or run it with your own details.
Result
When a tool is not enough: if the decision needs more than one answer, talk it through in a call. Book 45 minutes with Shashwat.
What next? Work with Shashwat Try another tool See all 85 tools and skills
Example answer
Generated on 2 November 2026 from this branch, with the inputs behind Fill in an example. Your own inputs give a different result.
ICP Intelligence report
Example: TAM SAM SOM Calculator
Show the full result
TAM/SAM/SOM Analysis
Market: Indian mid-size companies with an ERP
- Company: not given (add the company input to name your company or product in this answer)
Sector notes: none. This calculator takes a market segment, not a product; give product category to the other ICP tools for notes that fit what you sell.
Input Data
| Input | Value | Source |
|---|---|---|
| Total Potential Companies | 9,000 | Your input |
| Average Contract Value | $24,000 | Your input |
| ICP Match Rate | 30% (Example figure: replace with your own) | Not supplied |
| Year 1 Market Share Target | 3.0% (Example figure: replace with your own) | Not supplied |
Market Sizing Results
TAM (Total Addressable Market)
TAM = Total Potential Companies × ACV
TAM = 9,000 × $24,000TAM = $216.0M
Everyone who could theoretically buy your product
SAM (Serviceable Addressable Market)
SAM = TAM × ICP Match Rate
SAM = $216.0M × 30% (Example figure: replace with your own)SAM = $64.8M (Example figure: replace with your own)
Companies that match your ICP and you can actually serve
SOM (Serviceable Obtainable Market)
SOM = SAM × Year 1 Market Share
SOM = $64.8M × 3.0% (Example figure: replace with your own)SOM = $1.9M (Example figure: replace with your own)
This uses an example Year 1 share (3.0% of SAM) because you did not supply one. The calculation does not establish that this revenue or share is attainable.
Visualization
Values computed with a preset rate you did not supply are examples.
Example figures: replace with your own.
┌─────────────────────────────────────────────────────────┐
│ TAM │
│ $216.0M │
│ ┌───────────────────────────────────────────┐ │
│ │ SAM │ │
│ │ $64.8M │ │
│ │ ┌─────────────────────────┐ │ │
│ │ │ SOM │ │ │
│ │ │ $1.9M │ │ │
│ │ └─────────────────────────┘ │ │
│ └───────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────┘What This Means for Your Business
Year 1 assumed share scenario
- Revenue at the assumed share: $1.9M (Example figure: replace with your own)
- Deals Needed: ~81 closed customers (Example figure: replace with your own)
- Monthly Target: ~7 deals/month (Example figure: replace with your own)
- Pipeline Required: $5.8M (SOM × 3, a 1 in 3 win rate) (Example figure: replace with your own)
Growth Path
Later years assume your market share doubles each year.
| Year | Market Share | Revenue Target | Customers |
|---|---|---|---|
| Year 1 | 3.0% (Example figure: replace with your own) | $1.9M | 81 |
| Year 2 | 6.0% (Example figure: replace with your own) | $3.9M | 162 |
| Year 3 | 12.0% (Example figure: replace with your own) | $7.8M | 324 |
Assumptions & Validation
Key Assumptions
- Company count accuracy: Validate against dated company records and industry reports you can inspect. Which software fits your case is a judgement call. Ask Shashwat: book 45 minutes at https://calendly.com/shashwat-gtmhelix/45min
- ACV: $24,000, your input, read as annual contract value; check it against your last closed deals in this segment
- ICP match rate: Not supplied, so a preset example is used; refine with actual data
- Market share: 3.0% (Example figure: replace with your own) of SAM in Year 1 means ~81 new customers; check that number against the deals your team closed last year
Data Validation Checklist
- [ ] Cross-reference company count with 2+ sources
- [ ] Validate ACV with recent closed deals
- [ ] Confirm ICP percentage with customer analysis
- [ ] Review market share against competitor data
How to Get Better Data
- Company records already available to you: Apply the ICP filters and record the count, source and date. Which software fits your case is a judgement call. Ask Shashwat: book 45 minutes at https://calendly.com/shashwat-gtmhelix/45min
- Industry Reports: Market sizing from industry analyst reports
- Competitor Analysis: Estimate competitor customer counts
- Customer Interviews: Ask about market perception
Investor-Ready Summary
The indian mid-size companies with an ERP segment represents a $216.0M TAM with $64.8M SAM of companies matching our ICP.
At the example Year 1 share of 3.0%, the calculation gives $1.9M SOM, requiring 81 customers at $24K ACV.
This scenario does not establish attainable market share. Figures calculated from your inputs, plus the preset rates marked as examples above.
Next Step: Use Lookalike Signal Generator to create targeting criteria
From this page's example inputs: 9,000 companies at $24,000 a year; the 30% ICP match and 3% year 1 share are the tool's example figures. Building an annual revenue plan with your leadership team? Open the B2B Market Sizing Lab to compare how your Founder, CEO, CMO, CRO and Demand generation head size reachable revenue against your target.
When a tool is not enough: if the decision needs more than one answer, talk it through in a call. Book 45 minutes with Shashwat.
How to read the answer
The calculator multiplies your Total potential companies by your Average contract value in dollars to get TAM, multiplies TAM by your ICP percentage to get SAM, and multiplies SAM by your Year 1 market share target to get SOM and the number of Year 1 customers needed. If you leave ICP percentage or Year 1 market share target blank, the tool uses labelled example presets (30% ICP match and 3.0% Year 1 share) and warns you that the scenario does not establish attainable market share. Check What This Means for Your Business for the implied monthly deal pace and required pipeline (SOM × 3 at a 1-in-3 win rate).
What to do next
- Founder: Replace any preset 30% ICP match rate or 3.0% Year 1 market share with your own measured percentages and cross-reference your total company count across two dated sources.
- CEO: Compare the Deals Needed and Monthly Target under What This Means for Your Business against the number of deals your team actually closed last year before putting the Investor-Ready Summary into a board or fundraising deck.
- CMO: Validate the ICP percentage against your CRM account analysis so SAM reflects companies that genuinely have the problem and budget you serve.
- CRO: Check whether your sales team has the rep capacity and win rate to generate and close the Pipeline Required (SOM × 3) at your stated average contract value.
- Demand generation head: Take the validated SAM segment definition into the Lookalike Signal Generator to build your reachable account and lead lists for Year 1.
Why come back
Come back whenever your average contract value shifts, you verify a sharper account count from dated industry records, or you need a separate bottom-up sizing for a new market segment or geography. The tool applies the same fixed rules every time. It does not call an AI model, and this site does not keep what you enter.
How do I calculate TAM bottom up?
Count the companies that could buy, multiply by the contract value you really win, then narrow to the share that fits your ICP and the share you can win in year 1. That is TAM, then SAM, then SOM.
Helix does not rank vendors or name software to buy for market sizing. Run this free calculator for a first number, check the company count against two dated sources and the contract value against your last closed deals, or book 45 minutes.
Who is the TAM SAM SOM Calculator tool not ideal for?
- Anyone who cannot give the inputs listed above, because the answer is built only from them.
- Teams looking for a list of companies to target: the tools describe and score profiles from your data, but they do not find companies.
- Teams that want market sizing without their own numbers: TAM, SAM and SOM are built from the figures you enter, and an ICP match rate or market share you leave out is filled with a labelled example (30% and 3%).
How do I use the TAM SAM SOM Calculator tool with an AI assistant?
Add ICP Intelligence once (see Use it in Claude, ChatGPT or Gemini), then ask in plain words. Here is a prompt built from the tested example:
My role is not stated. Ask me for my role first. Use ICP Intelligence's TAM SAM SOM Calculator tool. total potential companies: 9000; average contract value: 24000; segment name: Indian mid-size companies with an ERP. If this tool is unavailable, ask me to open its web page; do not invent its output. In Gemini CLI or Antigravity, use the Helix GTM Suite skills package for related guidance, without claiming to run this connector.
How does the TAM SAM SOM Calculator tool work?
You do not need to sign in. A web browser is enough, and the answer comes back in a second or two.
- Fill in the form above, or press Fill in an example.
- Press Run TAM SAM SOM Calculator.
- Read the result on this page, then copy it and edit it before you use it.
It applies fixed rules in the ICP Intelligence code to the inputs above and returns text. It does not call an AI model, does not look anything up, and does not store what you type. The web form and the AI assistant connector run the same tool code, so the same input gives the same answer in both.
Previous: Buyer Group AnalyzerNext: Lookalike Signal Generator
For developers
MCP tool name: tam_sam_som_calculator. REST: POST https://icp-intelligence.gtmhelix.com/api/tools/tam_sam_som_calculator with this JSON body (see How it works):
{
"input": {
"total_potential_companies": 9000,
"average_contract_value": 24000,
"segment_name": "Indian mid-size companies with an ERP"
}
}
Choose your app
Run a Helix tool in your browser, then take the result to ChatGPT, Claude or Gemini. Connectors work with supported plans in Claude, ChatGPT, Cursor, VS Code and Windsurf. The Helix GTM Suite skills package supports Claude Code, Gemini CLI, Antigravity, Cursor and VS Code, and is available through skills.sh. Each plugin has its own installation steps, below or on its own page.
Prefer a guided room you can share with your team? Open the Market Sizing Lab on ChatGPT Sites or the Positioning Workshop on ChatGPT Sites.
Connector setup guides · Skills package setup guide · Find the skills on skills.sh