TAM SAM SOM Calculator
Size your market from the bottom up.
Enter your values
ⓘ Live results
Results
- SOM (realistic)
- $1,200,000.00
- TAM
- $120,000,000.00
- SAM
- $30,000,000.00
- Customers in SOM
- 2,500
Quick answer
TAM is the whole market, SAM the part you can serve, SOM the share you can realistically win.
TAM = customers × annual revenue per customer
How to use the TAM SAM SOM Calculator
- 1Estimate total potential customers.
- 2Enter annual revenue per customer.
- 3Set the shares you can serve and win.
Worked example
Using the values the calculator loads with:
Inputs
- Total potential customers250000
- Annual revenue per customer480 $
- Serviceable share25 %
- Obtainable share of SAM4 %
Results
- SOM (realistic)$1,200,000.00
- TAM$120,000,000.00
- SAM$30,000,000.00
- Customers in SOM2,500
Frequently asked questions
Why bottom-up?
Investors distrust top-down 'if we get 1% of a billion' claims.
What SOM is credible?
1–5% of SAM within three years for a new entrant.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.