Free Burn Rate & Runway Calculator
Calculate months of runway based on your current cash, expenses, and revenue.
Financial Inputs
Results
Monthly Net Burn
$100,000
Gross Burn Rate
$150,000/mo
Simple Runway
20.0 months
Without revenue growth
Adjusted Runway
10+ years
With 10% MoM growth
How to Calculate Burn Rate and Runway
Burn rate is how fast your startup is spending cash. Runway is how many months you have before the money runs out. These are the two most critical survival metrics for any venture-backed company. This calculator computes both your simple runway (assuming flat revenue) and an adjusted runway that accounts for monthly revenue growth — and tells you whether you are "default alive" or "default dead."
- Calculate gross and net burn rate from expenses and revenue
- Determine simple runway without factoring in growth
- Model adjusted runway with monthly revenue growth compounding
- Get a "default alive or dead" assessment based on your trajectory
Burn Rate & Runway Calculator FAQ
Burn rate is how much cash your company spends per month. Gross burn is total monthly expenses. Net burn is expenses minus revenue — the actual cash you lose each month.
Divide your cash on hand by your monthly net burn rate. For example, $2M in the bank with $100K net burn gives you 20 months of runway.
A term coined by Paul Graham. A startup is "default alive" if it will reach profitability before running out of cash at its current growth rate. "Default dead" means it will run out of cash first and needs to raise or cut costs.
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