What is TAM?
Total Addressable Market (TAM) represents the total revenue opportunity available if a product or service achieved 100% market share. It defines the absolute ceiling of the opportunity.
Market Sizing
TAM / SAM / SOM Calculator
Estimate your Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) to understand the size of your startup opportunity.
Results
TAM
$100M
Total revenue opportunity available in the market.
SAM
$20M
Portion of the market you can realistically serve.
SOM
$2M
Portion of the market you can realistically capture.
Market Opportunity
TAM$100M
SAM$20M
SOM$2M
Market sizing summary
Of a $100M total addressable market, your product can realistically serve $20M (20%) and capture $2M (10% of SAM) over the long term.
What if you captured more market?
10%
1%50%
Learn the fundamentals
A quick founder-friendly primer on the concepts behind this calculator.
What is SAM?
Serviceable Available Market (SAM) is the portion of TAM that your product or business model can realistically serve based on geography, segment, channels, and operational constraints.
What is SOM?
Serviceable Obtainable Market (SOM) is the share of SAM your company can realistically capture in a reasonable time horizon given competition, distribution, and execution capacity.
Why Do Investors Care About TAM, SAM, and SOM?
Investors use TAM/SAM/SOM to assess whether a business can grow large enough to deliver venture-scale returns. A credible SOM grounded in realistic assumptions is often more persuasive than a sky-high TAM with no execution path.
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