Calculator Inputs
Example Data Table
| Industry | Region | Total Buyers | Avg Annual Revenue | Addressable % | Serviceable % | Obtainable % |
|---|---|---|---|---|---|---|
| Cloud CRM Software | North America | 500,000 | $850 | 65% | 45% | 12% |
| Fitness App Subscriptions | Europe | 1,200,000 | €120 | 55% | 40% | 8% |
| Industrial IoT Monitoring | Asia Pacific | 90,000 | $4,500 | 70% | 38% | 10% |
Formula Used
Top-Down TAM = Total Buyers × Average Annual Revenue per Buyer
SAM = TAM × Addressable Segment % × Serviceable Reach %
SOM = SAM × Obtainable Share %
Adjusted SOM = SOM × Confidence Adjustment %
Future Market Value = Current Value × (1 + Growth Rate)Years-1
Bottom-Up TAM = Target Companies × Average Clients per Company × Average Revenue per Client
How to Use This Calculator
- Enter the industry and region you want to estimate.
- Choose top-down or bottom-up sizing.
- Add buyers, revenue, and share assumptions.
- Enter annual growth and confidence adjustment percentages.
- Submit the form to view TAM, SAM, SOM, forecasts, and chart output.
- Use CSV or PDF export for reporting or internal planning.
Frequently Asked Questions
1. What does TAM mean?
TAM means total addressable market. It estimates the full revenue opportunity if every possible buyer in the chosen market purchased your product or service.
2. What is the difference between SAM and SOM?
SAM narrows the market to customers you can realistically serve. SOM goes further and estimates the share you can actually win within that serviceable market.
3. When should I use top-down sizing?
Use top-down sizing when you know total market populations, segment percentages, and average revenue figures. It works well for broad strategic planning and investor summaries.
4. When is bottom-up sizing better?
Bottom-up sizing is useful when you know how many companies you can target, expected clients per company, and average revenue per client. It often feels more operational.
5. Why include a confidence adjustment?
Confidence adjustment reduces optimistic estimates. It helps planners reflect uncertainty in data quality, buyer behavior, channel strength, pricing assumptions, or sales execution risk.
6. Can this calculator help with forecasting?
Yes. The growth rate and forecast years project TAM, SAM, and adjusted SOM forward, helping you compare present opportunity with future market expansion.
7. Should I use buyers, households, or companies?
Use the unit that best matches your business model. Consumer offers may use households or people, while B2B offers usually use companies, accounts, or locations.
8. Is this calculator enough for a full market study?
No. It is a fast estimation tool. A complete study should also examine competitors, pricing, channel costs, seasonality, regulation, and customer adoption patterns.