Investors and launch plans both ask how big the market is. A bottom-up estimate is the most defensible: count the potential customers, multiply by what each would pay per year to get TAM (total addressable market), take the share you can actually reach with your product and channels for SAM (serviceable available market), and the share you can realistically win in the next few years for SOM (serviceable obtainable market). The calculator does the arithmetic; the quality of the answer depends on your customer count and shares.
TAM is everyone who could ever buy this kind of product, SAM is the part your product and channels can serve, and SOM is the part you can realistically win soon.
Bottom-up (customers times price) is easier to defend than taking a percentage of a big industry report figure, because every input can be checked.
For a new product, a small single-digit share of SAM over a few years is a common assumption. Justify it with your channels and conversion rates.
Investors and launch plans both ask how big the market is. A bottom-up estimate is the most defensible: count the potential customers, multiply by what each would pay per year to get TAM (total addressable market), take the share you can actually reach with your product and channels for SAM (serviceable available market), and the share you can realistically win in the next few years for SOM (serviceable obtainable market).
Yes. TAM SAM SOM Calculator is completely free, with no sign-up and no usage limits.
Yes. TAM SAM SOM Calculator runs in any modern web browser. There is nothing to download or install.
Yes. TAM SAM SOM Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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[](https://yourhack.ai/tam-sam-som-calculator)