Startup Runway Calculator
How many months of cash your startup has left at its current net burn rate.
🔒 Runs entirely in your browser — nothing here is ever uploaded
About the Startup Runway Calculator
Estimates how many months of cash a startup has left at its current net burn rate — the pace cash actually declines once monthly revenue is netted against monthly expenses — and projects the approximate date cash runs out.
- Enter your current cash balance.
- Enter monthly expenses (gross burn) and monthly revenue.
- Read your runway in months and the projected cash-out date in the result panel.
With $500,000 cash on hand, $80,000 in monthly expenses, and $30,000 in monthly revenue: net burn is $50,000/month, giving a runway of 10 months.
This assumes cash balance, monthly expenses, and monthly revenue all stay constant going forward — real startups' spending and revenue fluctuate, so treat the result as a snapshot based on today's numbers, not a guaranteed forecast.
- • If monthly revenue meets or exceeds monthly expenses, runway is indefinite at these numbers.
- • Gross burn and net burn tell different stories — always check which one a term sheet or investor update is quoting.
- • Runway shortens faster than most founders expect once a large one-time expense hits — rerun this after any big hire round or major purchase.
- a16z — What is startup runway, and how should founders think about it — accessed 2026-08-30
Illustrative estimate only, not financial or tax advice. Verify figures with a licensed adviser or your local tax authority.