TAM
Total addressable market
50,000 accounts
Target accounts × annual revenue per account
Free market sizing tool
Free TAM, SAM, and SOM calculator—no signup required
Enter four assumptions to calculate a transparent bottom-up market size and three reachable-market scenarios. Copy the result, share the same model with an adviser, or carry it into Kona Workspace for source validation and a top-down cross-check.
Bottom-up formula you can inspectInstant results without signupThree reachable-market scenariosSource-backed Workspace handoff
Bottom-up formula you can inspect
Start with target accounts and annual revenue per account, then apply serviceable and obtainable shares without hiding the arithmetic.
Instant results without signup
Change any input and compare TAM, SAM, and SOM immediately. The free calculation runs locally in your browser.
Three reachable-market scenarios
Compare conservative, base, and upside SOM outcomes so one aggressive reach assumption does not masquerade as a forecast.
Source-backed Workspace handoff
Preserve the model assumptions through sign-in, then ask Kona to validate account counts, add dated sources, and build a top-down cross-check.
Free interactive calculator
Enter four assumptions. See the math immediately.
This bottom-up model runs in your browser. No account is required, and the values you enter are not sent to Kona by the calculator.
SAM
Serviceable available market
17,500 accounts
TAM × serviceable share
SOM
Serviceable obtainable market
700 accounts
SAM × obtainable share
SOM scenarioShare of SAMAnnual revenue
Conservative
350 accounts
2%
$4.2M
Base
700 accounts
4%
$8.4M
Upside
1,050 accounts
6%
$12.6M
What this result does—and does not—prove
The arithmetic is deterministic, but the market is only as credible as the account count, pricing, segment filters, and reach assumption behind it. Validate those inputs with dated sources and operating evidence before publishing the result.
What you get
A calculator that shows its work
Get useful math before creating an account, then decide whether the assumptions deserve a deeper research workflow.
Bottom-up formula you can inspect
Start with target accounts and annual revenue per account, then apply serviceable and obtainable shares without hiding the arithmetic.
Instant results without signup
Change any input and compare TAM, SAM, and SOM immediately. The free calculation runs locally in your browser.
Three reachable-market scenarios
Compare conservative, base, and upside SOM outcomes so one aggressive reach assumption does not masquerade as a forecast.
Source-backed Workspace handoff
Preserve the model assumptions through sign-in, then ask Kona to validate account counts, add dated sources, and build a top-down cross-check.
How it works
What the free model gives you
Use the result as a transparent starting point—not as proof that the market assumptions are correct.
TAM, SAM, and SOM annual revenue
Account counts at every market layer
Conservative, base, and upside SOM
Visible formulas and assumptions
Copyable model summary
Shareable model link for cofounders and advisers
Source-validation handoff to Workspace
Questions
Market sizing FAQs
The questions founders, operators, and investors usually ask before relying on AI-assisted TAM, SAM, and SOM calculations.
What inputs are required for the calculator?
Enter the number of target accounts, annual revenue per account, the percentage of the total market you can serve, and the percentage of that serviceable market you can realistically obtain.
How does the calculator define TAM, SAM, and SOM?
TAM equals target accounts multiplied by annual revenue per account. SAM applies your serviceable share to TAM. SOM applies your obtainable share to SAM.
Does the free calculator upload my inputs?
No. The arithmetic runs in your browser. Copy model link includes your four assumptions and currency in the link so anyone who receives it can open and edit the same model. Treat that link as shareable information. Continuing in Workspace preserves the model for your private planning workflow.
Is the result ready to show investors?
The formula is transparent, but user-supplied assumptions still need evidence. Use the Workspace handoff to research the account count, document segment filters, add dated sources, and test sensitivity before publishing.