Calculate startup runway — enter your cash on hand and monthly burn rate to see how many months your company can operate before running out of funds. Results update live.
Frequently Asked Questions
How is startup runway calculated?
Runway (months) = Cash on hand ÷ Monthly burn rate. With $500,000 cash and $50,000 monthly burn, you have 10 months of runway.
What is monthly burn rate?
Monthly burn is net cash spent per month — total expenses minus revenue. Use the Burn Rate Calculator to derive it from starting cash, ending cash, and months elapsed.
How much runway should a startup have?
Most investors expect 12–18 months of runway after a funding round. Start fundraising when you have roughly 6 months left to allow time to close a round.
How can I extend runway?
Cut non-essential spending, increase revenue, or raise capital. Use the Break-Even Calculator to find when revenue covers costs.
Is this tool free and does it work on mobile?
Yes on both counts. The Startup Runway Calculator on draft21 is completely free with no sign-up required and works on all devices.