Free Tool — No account needed
Startup Runway Calculator
Calculate your months of runway, default date, and net burn. Know exactly when to start fundraising. Results update as you type.
Cash & burn
🛣️
Enter your cash balance and monthly burn rate above to calculate your runway.
What runway tells you
⏱️
12 months is the fundraising trigger, not the safety point
At 12 months runway, start your next raise immediately. Fundraising takes 3–6 months. If you wait until 6 months, you're negotiating from desperation. Investors can smell it.
📊
Net burn is what matters, not gross burn
Gross burn hides your revenue offset. A company spending $50K/month with $40K MRR has only $10K net burn and an entirely different story. Always use net burn for runway calculations.
🎯
Revenue growth buys runway without dilution
Every dollar of new monthly revenue extends your runway by cash_balance ÷ netBurn² months (roughly). Growing MRR from $10K to $20K can add 6+ months of runway on a $30K burn — free from a dilution perspective.
Runway benchmarks
18+ months
ComfortableFocus on growth — runway is not the constraint
12–18 months
Start fundraisingBegin your next round now — don't wait
6–12 months
AmberAct immediately — raise, cut, or accelerate revenue
< 6 months
CriticalSurvival mode — every decision must extend runway
Frequently asked questions
Extend runway through revenue
A LaunchBuff listing is free — get in front of 30,000+ founders and let them discover your product organically. Every customer acquired without ad spend extends your runway.
Submit your product