Stress test
AI Startup Autopsy
Combine revenue, users, pricing, model tokens, and retries into one explicit contribution scenario and share card.
Free tools
Do the math before the model bill does it for you.
Every calculator shows its formula, assumptions, and data boundary. Estimates remain estimates until your product connects observed revenue and provider-reported usage.
RevenueYour input
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AI costYour usage
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ResultExplainable
Pick one question
Calculations worth getting right.
Margin
AI margin calculator
Subtract AI cost and selected variable fees from revenue, then see contribution profit and margin.
Cost
LLM cost per user
Separate uncached input, cache reads, cache writes, output, calls, retries, and active users.
Pricing
AI pricing break-even
See how many calls or tokens a plan can support before its contribution profit reaches zero.
Free calculator
AI retry waste calculator
Calculate observed retry waste without treating incomplete failed calls as free.
From estimate to evidence
Connect the same formula to your real product.
Grow or Die keeps missing data blank and shows which source supplied every number.