Market Size Calculator (TAM / SAM / SOM)
Estimate your market size the way investors expect to see it: Total Addressable Market, Serviceable Addressable Market, and the slice you can realistically obtain.
What TAM, SAM, and SOM mean
TAM (Total Addressable Market) is the total annual revenue available if every possible customer bought your product — the whole ocean. SAM (Serviceable Addressable Market) is the portion you can actually reach given your geography, segment, and channels — your part of the ocean. SOM (Serviceable Obtainable Market) is the realistic share you can win in the near term given competition and capacity — the fish you can actually catch.
This is a top-down estimate
This calculator multiplies the number of potential customers by your annual price to get TAM, then applies your reachable percentage for SAM and your expected market share for SOM. Top-down sizing is great for a quick sanity check. For a pitch, pair it with a bottom-up estimate built from how many customers you can actually acquire per month.
Want the full picture? Read our guide on estimating market size in the Knowledge Hub.
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