Before pitching investors, planning a go-to-market strategy, or deciding which industry to target next, it helps to have a rough number for how big the opportunity actually is. Our free TAM Calculator gives you a quick, directional estimate.

How it works: enter the number of companies in your target segment (for example, the number of mid-sized real estate firms in your target region) and your average annual deal value. The calculator multiplies these to estimate your Total Addressable Market — the maximum possible revenue if you captured 100% of that segment.

Who this is for: founders building an investor pitch deck, sales leaders evaluating whether a new vertical or industry segment is worth pursuing, and marketing teams sizing an opportunity before committing budget to a new campaign.

TAM vs. SAM vs. SOM: TAM is the broadest, most theoretical number — the entire addressable market if you had 100% share, which no company ever actually achieves. For a more realistic planning number, narrow your company count down to your Serviceable Addressable Market (the portion you could realistically reach with your current model) and apply an expected market share estimate to get your Serviceable Obtainable Market.

Where to get your company count: this is often the hardest number to pin down accurately — industry reports, government business registries, and licensed B2B databases (like the one this site provides) are common sources for a defensible target company count, rather than a rough guess.

Enter your numbers above for an instant estimate — useful as a starting point for a pitch deck or planning conversation, not a substitute for a full market sizing study.