The TAM, SAM, SOM Market Sizing Calculator breaks down total market opportunity into three realistic tiers for pitch decks and investor due diligence.
Mathematical Formulas
- TAM (Total Addressable Market):
TAM = Total Customer Count * Annual ARPU(Theoretical maximum demand if you had 100% market monopoly). - SAM (Serviceable Addressable Market):
SAM = TAM * Target Geographic/Fit Segment %(The subset of the market your product is actually built to serve). - SOM (Serviceable Obtainable Market):
SOM = SAM * Realistic Capture Rate %(Your targeted near-term revenue goal achievable within 2-4 years).
Frequently Asked Questions (FAQ)
What is the minimum TAM threshold for venture funding?
Most institutional seed and Series A funds seek a TAM of at least $1 billion to believe the company can reach $100M+ in revenue and generate a venture-scale return.
Why is a bottom-up TAM preferred over top-down research reports?
Top-down quotes from Gartner/IDC are often vague and inflated. Bottom-up sizing (number of identifiable target accounts x ACV) shows rigorous domain knowledge.