Sales & marketing
TAM, SAM and SOM market sizing Calculator
Build a bottom-up market estimate from potential accounts and annual customer spend. This free tam, sam and som market sizing calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Build a bottom-up market estimate from potential accounts and annual customer spend.
Calculated outcomes
- Obtainable Accounts
- 300
Assumptions and estimates
- Bottom-up annual TAM, SAM and SOM. Attainable share applies to the serviceable market; customer counts, spend and capture assumptions need external evidence.
- Method: TAM = accounts × annual revenue per account. SAM applies the serviceable share; SOM applies attainable share to SAM.
- Account counts, customer spend and market share are assumptions that need evidence and competitive assessment.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the tam, sam and som market sizing calculation works
TAM = accounts × annual revenue per account. SAM applies the serviceable share; SOM applies attainable share to SAM.
Account counts, customer spend and market share are assumptions that need evidence and competitive assessment.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review total addressable market and serviceable market and obtainable market, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Total possible accounts
- 20000
- Annual revenue per account (€)
- 1500
- Serviceable share of accounts (%)
- 30
- Attainable share of serviceable market (%)
- 5
- Total Addressable Market
- €30,000,000.00
- Serviceable Market
- €9,000,000.00
- Obtainable Market
- €450,000.00