Free Startup Finance Tools

Four free calculators for the numbers that decide how long a company has left, and two more free tools that answer the same kind of question. No account, no card, no demo call.

The four calculators

• Startup runway calculator — enter cash on hand, monthly revenue, monthly expenses and growth rate to get your months of runway and the month the cash runs out.
• Burn multiple calculator — how many dollars of burn bought each dollar of net new ARR, from new and total ARR at the start and end of a period.
• Dilution calculator — the percentage of the company a round costs you, from pre-money valuation, amount raised and the existing option pool.
• LTV:CAC calculator — lifetime value against acquisition cost, graded separately from payback, because a healthy ratio with a slow payback is how a growing company runs out of cash.

Two more free tools

• Default alive or default dead test — Paul Graham's question, answered on your own numbers, with what it would take to flip the answer.
• Startup survival simulator — a Monte Carlo survival probability rather than a single point estimate.

One number is not a forecast

Every calculator here holds your inputs steady and returns a single answer. Real revenue is lumpy, and the month that decides the outcome is rarely the average month. FounderConsole connects to your actual financial data and runs the same question thousands of times, so runway comes back as a distribution with P10/P50/P90 bands instead of one date.

Where these formulas come from

Each calculator states its formula and its benchmark on the page, records whether the formula is textbook or a stated choice, and pins a worked example in a test. Where a common shortcut is wrong — monthly churn multiplied by twelve instead of compounded, for instance — the page shows the size of the error rather than hiding it.

When you are ready for live data and ongoing forecasts, the AI CFO answers a financial question from your own connected numbers, and you can get started free. See pricing for what is included during early access.