Market size, startup costs, break-even, pricing, margins, customer cost, payroll, insurance, funding and the hard growth calls — test every idea against honest maths before you spend real money on it. The full detailed report costs less than a coffee: $2.95.
Every ambitious founder has been told their market is 'huge' by someone selling them something. This calculator does the opposite: it walks top-down from everyone who could buy, narrows to the people you can actually reach, then applies a capture rate you could defend in a meeting — usually 1%, not 10%. The result is an honest ceiling for your idea, and a direct comparison against the revenue goal you wrote down before you clicked. If the ceiling is below the goal, the market math is telling you something worth hearing before you spend real money.
Estimate your total addressable market (TAM), serviceable market (SAM) and realistic obtainable share (SOM) — and see whether the numbers can actually support your revenue goal.
No — a huge TAM with a tiny obtainable share is still a tiny business. Most failed ideas die in the gap between 'everyone buys this' and the slice you can genuinely win. SOM is the number that matters.
For a solo founder breaking into a broad market, 1% within three years is already ambitious; above 5% is rare without serious funding. Pick a rate you could defend to an investor, then halve it and see if the plan still works.
No. Top-down sizing shows the ceiling; bottom-up conversations show real demand. Use both — the calculator tells you if the prize is big enough, and customer interviews tell you if anyone will actually pay.
Every tool answers instantly from our own knowledge base and calculators — no AI cost, no waiting, no account. Want the deeper, personalised version? Each has a $2.95 full report.