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Market sizing calculator

Market Size Calculator (TAM, SAM, SOM)

Estimate TAM, SAM, and SOM from market size, audience share, spend, geographic coverage, and penetration assumptions.

No install requiredProcessed on your deviceExport-ready outputWorks on mobile & desktop

Garbage in, garbage out—your outputs are only as good as the assumptions behind population and audience %.

Used for guidance only—it does not change the math.

Potential customers or comparable market units (1–1,000,000,000). Keep definitions consistent with average spend (e.g. both annual or both per order).

10%
50%
5%
10%

Upside multiplier on obtainable share (0–100%). Applied as SOM = SAM × penetration × (1 + advantage/100).

Fill in the form and press Calculate. Results and the nested chart are computed on the server.

How This TAM SAM SOM Calculator Works

1

Define the universe

TAM SAM SOM calculator math starts with your market universe: enter total potential customers (or consistent market units), then the share that matches your ICP. Multiply by average spend to get TAM.

2

Layer geography

Apply geographic coverage to TAM to get SAM—what you can actually serve with your current GTM and footprint.

3

Set realistic penetration

SOM is SAM × penetration × (1 + competitive advantage). This is your near-term obtainable revenue; tune it for credibility.

Why Use Our TAM SAM SOM Calculator

Investor-ready structure

This TAM SAM SOM calculator outputs a standard TAM / SAM / SOM stack plus market share, monthly revenue, and LTV for decks and memo appendices.

Nested visualization

Concentric circles show how SAM sits inside TAM and SOM inside SAM—proportional to the dollar results.

Documented formulas

Deterministic math on the server—no AI, no randomness—so numbers are reproducible from your inputs.

Protected API & rate limits

Calculations run through a protected API with per-IP throttling to help reduce abuse.

Common questions

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