Startup Runway Calculator
Calculate how many months your startup's cash will last. Includes gross burn, net burn with revenue, and extended runway scenarios.
How to Use This Calculator
Enter your startup's current cash balance. Enter your monthly burn rate — the total amount you spend each month on salaries, rent, software, marketing, and all other expenses. Enter the emergency fund reserve you want to keep aside (cash you won't touch unless absolutely necessary). If your startup has any revenue, enter your monthly revenue. The calculator instantly shows your runway in months, your gross burn (total expenses without revenue), net burn rate (expenses minus revenue), and what happens to your runway if you reduce burn by 10%.
How Startup Runway Works
Runway is the amount of time a startup can continue operating before running out of cash. It's one of the most critical metrics for early-stage companies. The basic formula is: (cash - emergency reserve) ÷ (monthly burn - monthly revenue). Most investors want to see at least 12-18 months of runway. Under 6 months is considered urgent and typically requires immediate action — cutting costs, raising revenue, or securing additional funding. Understanding your runway helps you make informed decisions about hiring, marketing spend, and when to raise your next funding round.