Burn Rate & Runway Calculator
Find your monthly burn rate and how many months of runway your cash gives you.
About the Burn Rate & Runway Calculator
Enter cash in the bank, monthly operating expenses, monthly revenue and its growth rate. The calculator gives gross and net burn, the runway in months, the date cash runs out (or when you reach break-even), and a chart of cash over time.
Gross burn is total monthly spending; net burn is spending minus revenue. Founders typically aim for 18–24 months of runway after raising and start the next raise with at least 6–9 months left.
The formula
Net burn = expenses − revenue; runway = cash ÷ net burn
Worked example
600,000 in the bank, 80,000 of expenses, 25,000 of revenue a month, no growth
- Net burn: 55,000 a month
- Runway: 600,000 ÷ 55,000 = 10.9 months
- Cash runs out around October 2027; start raising by early 2027
Questions people ask
Gross vs net burn?
Gross is all spending; net subtracts revenue.
What's default alive?
When current growth reaches profitability before cash runs out.
How do I extend runway?
Cut the largest costs, raise prices or grow revenue; enter a growth rate to see its effect.