Startup Market Size Calculator with Benchmarks

Your total addressable market is more than a slide-deck courtesy line—it's the bedrock of every valuation, forecast and fundraising story you'll tell. Our calculator lets you combine industry benchmarks with your own traction, so you can speak to investors with numbers that stand up to scrutiny.

Investors can forgive an unrefined pitch deck, but they will not forgive a market that fails to justify the risk. Treat market sizing as your opening argument: concise, data-backed and framed in the language of opportunity—not hype.

1. Choose your industry – Select from 200+ benchmarked verticals.
2. Enter your traction – Revenue, users or GMV; we normalise it behind the scenes.
3. Triangulate & export – Compare Top-Down, Bottom-Up and Value-Based views, then drop the figures straight into your deck or Equidam valuation model.

Need a deeper dive? Read Benchmark Your TAM.

Use all four lenses—then reconcile the story they tell.

• Identify Top-Down Potential – Start with credible third-party data and pare it down logically.
• Ground with Bottom-Up Reality – Map unit economics × target customer count to prove feasibility.
• Apply Value-Based Sizing – Anchor your market to the value you unlock, not just spend levels.
• Triangulate & Reconcile – Show how the three views converge (or why they differ) and explain your chosen figure.

Recommended reading:

• Top-Down vs Bottom-Up Sizing → How to Estimate Market Size for a Startup
• Benchmarking Financial Projections → How to Benchmark Startup Revenue and EBITDA Projections
• Value-Based Sizing → Price vs Value: The Momentum Trap in VC

• Generic "$300 B global land-grab" claims that ignore regulation or culture
• Tiny SOM masquerading as "initial traction"
• Double-counting revenue streams when switching between sizing methods
• Forgetting to cite your external sources
• Rounding numbers to look neat (investors immediately notice)

Export the results, attach them to your Equidam valuation report, and share both in your next data-room drop. Revisit your market size every quarter—industries move fast, and so should your benchmarks. Want to understand how market size flows into valuation? Check out our Methodology page.