IdeaRank AIStartup calculators
Run the real numbers on your idea — LTV, CAC, runway, break-even and more. Instant and free. Then get a brutally honest verdict on the whole thing.
Customer Lifetime Value (LTV)
How much gross profit one customer brings over their whole relationship.
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LTV = ARPU × lifespan × gross margin. Aim for LTV ≥ 3× CAC.
Customer Acquisition Cost (CAC)
What it costs, on average, to win one paying customer.
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CAC = total sales + marketing spend ÷ new customers acquired.
LTV : CAC ratio
The single number investors check: is each customer worth more than they cost?
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Healthy SaaS sits at 3× or above.
Cash Runway
How many months you can operate before the money runs out.
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Runway = cash in bank ÷ net monthly burn. Under 6 months = raise or cut now.
Break-even units
How many units/subscriptions you must sell to cover your fixed costs.
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Break-even = fixed costs ÷ (price − variable cost per unit).
Return on Investment (ROI)
The percentage return on money you put in.
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ROI = (return − cost) ÷ cost × 100.
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