Burn Rate / Runway Calculator
Calculate your startup's monthly burn rate, net burn, and cash runway. Visualize month-by-month projections of your remaining balance.
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How to use
Enter your cash balance
Input your current total cash on hand. This is the starting point for calculating how many months your startup can survive.
Add your monthly expenses
List each recurring monthly expense (salaries, rent, tools, marketing, etc.) with its amount. Click 'Add Expense' to add more line items.
Optionally add monthly revenue
If your startup generates revenue, enter the monthly amount. This reduces your net burn and extends your runway.
Review results and projection
Instantly see your gross burn rate, net burn rate, runway in months, and projected zero-cash date. The month-by-month table shows exactly how your balance declines over time.
Use cases
Pre-seed startup planning
"You raised $300K and spend $25K/month. The calculator shows you have 12 months of runway — enough time to hit milestones for a seed round."
Post-fundraise budgeting
"After closing a $2M seed round, you need to plan hiring and spending so your runway lasts 18-24 months until the next raise."
Revenue impact analysis
"Your startup burns $50K/month but earns $15K in revenue. See how your net burn of $35K extends runway from 10 to 14 months."
Board meeting preparation
"Prepare clear financial projections showing your current runway and zero-cash date to present at board meetings or investor updates."
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Frequently Asked Questions
?What is burn rate?
Burn rate is the rate at which a startup spends its cash reserves. Gross burn is total monthly spending, while net burn subtracts any revenue you earn.
?What is runway?
Runway is the number of months your startup can continue operating before running out of cash. It is calculated as cash balance divided by net monthly burn rate.
?What is the difference between gross burn and net burn?
Gross burn is your total monthly expenses. Net burn is gross burn minus monthly revenue. If you have no revenue, gross burn equals net burn.
?How much runway should a startup have?
Most investors and advisors recommend maintaining 12-18 months of runway. This gives enough time to hit key milestones and raise the next round of funding.
?Is my financial data kept private?
Yes. All calculations run entirely in your browser. No financial data is sent to any server. Your sensitive startup financials remain completely private.
?Is this tool free to use?
Yes. The Burn Rate / Runway Calculator is completely free with no sign-up required and no usage limits.
?Can I add custom expense categories?
Yes. You can add as many expense line items as you need, naming each one whatever you like (e.g., salaries, AWS, legal, marketing).
?Does the projection account for revenue growth?
The current projection uses a fixed monthly revenue figure. For growth scenarios, you can update the revenue field and recalculate to compare different cases.