calculadora tam

What is TAM and why does it matter?

TAM stands for Total Addressable Market. It answers one simple but powerful question: “If we captured 100% of the market we are targeting, how much revenue could we make?” A good TAM estimate helps founders, product teams, analysts, and investors decide whether an idea is tiny, medium-sized, or genuinely large.

In practical planning, TAM is often paired with two related metrics:

• SAM (Serviceable Available Market): the part of TAM your business model and product can actually serve.
• SOM (Serviceable Obtainable Market): the part of SAM you can realistically capture based on competition, budget, and execution.

How this calculadora TAM works

This calculator uses a classic bottom-up approach. You provide the number of potential customers and annual revenue per customer, then apply serviceability and capture percentages.

Formulas used

• TAM = Total Potential Customers × Average Annual Revenue per Customer
• SAM = TAM × Serviceable Market %
• SOM = SAM × Obtainable Market %

If you provide a growth rate, the calculator also estimates a 3-year projection for TAM, SAM, and SOM.

Example scenario

Imagine you are launching a B2B subscription tool for independent clinics:

• Potential clinics in your target region: 50,000
• Average annual subscription per clinic: $900
• You can serve about 35% of the full market due to language, regulation, and support limits
• Realistic share of that serviceable segment in the next few years: 12%

Your model would be:

• TAM = 50,000 × 900 = $45,000,000
• SAM = 45,000,000 × 35% = $15,750,000
• SOM = 15,750,000 × 12% = $1,890,000

That final SOM number is often the most useful for short- to medium-term planning because it anchors your goals to realistic execution.

Top-down vs bottom-up TAM

Top-down method

You start from an external market report and narrow it down. This is fast and useful for context, but can be too generic or inflated if not adjusted carefully.

Bottom-up method

You start from unit economics (customers × price) and build upward. This is typically more credible for internal planning and fundraising because assumptions are easier to audit and defend.

Best practice

Use both approaches. If your top-down and bottom-up estimates are wildly different, revisit your assumptions before making strategic decisions.

Common TAM mistakes to avoid

• Counting everyone as a customer: not every user has the same need, budget, or willingness to buy.
• Ignoring geographic and regulatory limits: serviceability constraints are often bigger than expected.
• Assuming instant market share: adoption takes time, especially in competitive categories.
• Using unrealistic ARPU: pricing assumptions should be validated with interviews or pilot sales.
• Never updating the model: TAM is not static; trends, pricing, and customer behavior change.

How investors and operators use TAM, SAM, and SOM

Investors often look at TAM for long-term upside, but they focus heavily on SOM for near-term credibility. Operators use SAM and SOM to set sales quotas, territory priorities, hiring plans, and product roadmap decisions.

A strong market model is not just a slide in a pitch deck. It should connect to real decisions:

• Which segment should we target first?
• How large can this segment become in 24–36 months?
• What retention and pricing are needed to hit targets?
• How much capital is required to reach our SOM goals?

Quick checklist for a reliable market sizing model

• Define your customer segment clearly (industry, size, region).
• Use validated pricing assumptions, not optimistic guesses.
• Separate TAM, SAM, and SOM in all strategic documents.
• Document every assumption so the model is explainable.
• Refresh the model quarterly as new data arrives.

Final thoughts

A calculadora TAM is most valuable when it turns abstract ambition into measurable reality. TAM shows potential, SAM shows focus, and SOM shows what can actually be achieved with your current strategy and resources. Use this calculator as a planning tool, then refine your assumptions with customer discovery, pricing tests, and sales data over time.