Burn Rate & Startup Runway Calculator
Most founders find out they're out of runway one month too late. Drop in three numbers — cash in the bank, what you collect each month, and what you spend — and you'll see your net burn rate and the exact month your startup runs out of money.
Enter your cash on hand, monthly revenue, and monthly expenses to instantly see your net burn rate and how many months of runway you have left. Nothing is sent to a server — every number stays on your device.
Your numbers
Currency and monthly/yearly are display settings — no exchange rates are applied, so enter all figures in the same currency.
Results
Healthy runway. You have time to keep building.
That's roughly August 2027 at today's pace.
Want this updated automatically from your bank CSV — with tax buffer, charts, and a 12-month projection?
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How burn rate works
How do you calculate burn rate?
Net burn rate = monthly expenses − monthly revenue. If you spend $8,000 and collect $3,000, your net burn is $5,000/mo. Gross burn ignores revenue and counts total spend.
How do you calculate startup runway?
Runway = cash on hand ÷ net burn rate. With $50,000 in the bank and a $5,000/mo net burn, you have 10 months of runway at today's pace.
What is a healthy runway for a startup?
Most investors want to see 12–18 months. Under 6 months is a red flag: it's usually time to cut costs, raise prices, or start a raise.
Stop recalculating this by hand every month
FlowingPulse keeps your burn rate, tax buffer, and runway up to date automatically — one CSV drop and you're current.
No bank login — CSV only · One-time $4.99, no subscription · 30-day money-back guarantee