SAM Calculator – Serviceable Available Market
Estimate your serviceable available market (SAM) — the slice of your TAM you can realistically serve — using a simple percentage or a detailed geography, segment, fit and distribution method.
Written and reviewed by the CalcBundle editorial team. Transparent formulas · results are estimates, not advice.
Serviceable available market
Enter your TAM (total addressable market) greater than zero.
What is a SAM calculator?
SAM — serviceable available market — is the part of your total addressable market that your product can actually serve right now. It accounts for the fact that no company can address an entire market: you are limited by where you operate, who you sell to, how well your product fits, and how you distribute it.
How to calculate SAM
- Simple: SAM = TAM × serviceable market %
- Detailed: SAM = TAM × geography % × segment % × product-fit % × distribution %
The detailed method is useful when you can estimate each constraint separately — it forces you to be explicit about what limits your reach.
TAM vs SAM
If TAM is “everyone who could ever buy this category”, SAM is “everyone we could actually sell to today”. A global $50M TAM might become a $10M SAM once you account for serving only certain countries and customer segments.
Example
A $50M TAM with a 20% serviceable share gives a $10M SAM. Using the detailed method, a $100M TAM × 50% geography × 50% segment × 80% fit × 50% distribution also yields $10M.
From SAM to SOM
SAM is what you could serve. To estimate what you could realistically capture, use the SOM calculator, which applies your expected market share or sales capacity. Together, TAM, SAM and SOM support a credible startup valuation.
Frequently asked questions
What is SAM (serviceable available market)?
SAM is the portion of the total addressable market (TAM) that your product can actually serve, given your geography, customer segment, product fit and distribution.
How do you calculate SAM?
Simple method: SAM = TAM × serviceable market %. Detailed method: TAM × geography % × segment % × product-fit % × distribution %. This calculator supports both.
What is the difference between TAM and SAM?
TAM is the entire market opportunity in theory. SAM narrows it to the part your business can realistically address today with its product, target customers and reach.
How is SAM different from SOM?
SAM is the market you could serve; SOM (serviceable obtainable market) is the share of that you could realistically capture given competition and your sales capacity.
Related calculators
Disclaimer. This calculator provides estimates for informational purposes only. Results are based on the information you enter and the assumptions used by the calculator. Actual financial, tax, business valuation, lending, marketplace or investment outcomes may differ. Consider consulting a qualified professional for decisions involving significant amounts of money. Market-size calculations are estimates and depend on the assumptions and data used. They should not be treated as guaranteed market revenue.