Startup Runway Calculator
Track your monthly gross and net burn rates, calculate total cash runway in months, and determine your exact cash zero date.
Startup Runway Calculator
Calculate how many months your startup can operate before running out of cash
Runway Remaining
12.5 months
Until cash runs out at current burn rate
✅ Strong runway — focus on growth and revenue.
Managing Cash Burn & Financial Runway for High-Growth Startups
In early-stage software and venture-backed tech startups, runway management is the most critical survival metric. Miscalculating burn rate can force unexpected down-rounds, forced layoffs, or sudden insolvency.
The Startup Runway Formulas
Net Burn Rate
Net Burn = Monthly Expenses - Monthly Revenue
Runway (Months)
Runway = Cash Balance ÷ Net Burn Rate
Manual Calculation Walkthrough
Consider a Seed-stage startup with $500,000 in bank cash, $45,000 in monthly expenses (payroll, servers, marketing), and $15,000 in recurring monthly revenue (MRR):
- Calculate Net Burn: $45,000 - $15,000 = $30,000/month net cash outflow.
- Calculate Runway: $500,000 ÷ $30,000 = 16.67 months of runway.
Frequently Asked Questions
When should a startup begin fundraising for the next round?
Startups should launch fundraising when they have 6 to 9 months of runway remaining. Closing a VC funding round takes 3 to 6 months on average.
What is default alive vs default dead?
Coined by Y Combinator's Paul Graham, a startup is "default alive" if its current revenue growth rate will reach profitability before its existing cash runway runs out.
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About the Startup Runway— Net Burn Rate & Cash Zero Date Calculator
The Startup Runway— Net Burn Rate & Cash Zero Date Calculator is a specialized online utility designed to help you calculate startup cash runway in months, net burn rate, and projected cash-out date. free financial planning calculator for founders and cfos. It performs calculations in real-time to provide immediate, reliable estimates for study, work, or daily tasks.
How to Use
Simply enter your parameters in the input fields of the calculator widget above. The tool evaluates the inputs instantly and displays the results in real-time. You can modify any value to check alternate scenarios and compare figures dynamically.
Data Privacy & Safety
All calculations are executed locally within your web browser. No inputs are sent to our servers or stored externally, ensuring your personal and financial details remain completely private and secure.
FAQ
Frequently Asked Questions
What is startup runway and how is it calculated?+
Startup runway is the total number of months a company can continue operating before running out of cash balance. It is calculated by dividing current cash reserves by monthly net burn rate: Runway (Months) = Cash Reserves / (Monthly Operating Expenses - Monthly Revenue).
What is the difference between Gross Burn and Net Burn?+
Gross burn is the total monthly operating expenditure (salaries, hosting, office, marketing). Net burn is gross burn minus incoming customer revenue: Net Burn = Gross Expenses - Monthly Revenue.
How many months of runway should a startup maintain?+
Venture capitalists recommend maintaining at least 18 to 24 months of cash runway to weather market downturns and complete fundraising cycles without pressure.