Startup runway calculator
See how many months of cash you have left — and when to raise or cut burn. Everything runs in your browser; nothing is stored.
You have some breathing room, but begin planning your next raise or path to profitability.
Why runway is the number that matters
Runway is the single metric that decides how much time you have to hit your next milestone. Watching it monthly — alongside CAC, LTV, and churn — keeps you ahead of a cash crunch instead of reacting to one. Pair this calculator with finance tools like Mercury and Baremetrics to track the inputs automatically.
Frequently asked questions
How do you calculate startup runway?
Runway = cash in the bank ÷ net monthly burn, where net burn = monthly expenses − monthly revenue. If you're break-even or profitable, runway is effectively unlimited.
How much runway should a startup have?
Most investors want to see 12–18 months of runway after a raise. Below 6 months is the danger zone — start raising or cutting costs immediately.
What is net burn vs gross burn?
Gross burn is total monthly expenses. Net burn subtracts revenue. Runway is based on net burn, since revenue offsets some of your spend.