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Burn Rate Calculator

Estimate monthly burn and runway from current cash balance and operating spend. Free online, browser-based tool with instant results and no signup.

Burn Rate Inputs

Cash on Hand ($)Monthly Revenue ($)Rent / Office ($)Salaries & Payroll ($)Marketing & Ads ($)Tools & Software ($)Other Expenses ($)

Understanding Startup Burn Rate

Burn rate is the speed at which a company spends its cash reserves before generating positive cash flow from operations. It is the single most important metric for startup survival.

Gross Burn vs. Net Burn

Gross burn rate is total monthly operating expenses regardless of revenue. It tells you the full cost of running the business.
Net burn rate is monthly expenses minus monthly revenue. This is the actual amount of cash you lose each month.

Calculating Runway

Runway (months) = Cash on Hand / Net Burn Rate

Runway tells you how many months your company can survive at the current burn rate before running out of cash. Most investors want to see at least 12-18 months of runway after a funding round.

Reducing Burn Rate

Common strategies include renegotiating vendor contracts, reducing headcount or hiring freezes, cutting marketing spend on low-ROI channels, switching to more affordable tools, and subletting unused office space. Focus on cuts that do not directly impact revenue generation.

When to Worry

If your runway drops below 6 months, treat it as an emergency. Fundraising typically takes 3-6 months, so waiting until you have only 3 months left puts you in a desperate negotiating position. Track burn rate weekly, not monthly, when runway is short.

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How to Use the Burn Rate Calculator

1
Enter your values
Open the Burn Rate Calculator and fill in the required input fields with your numbers or selections.
2
Review the calculation
The tool automatically computes the result as you type. Double-check your inputs to ensure accuracy.
3
Interpret your results
Review the calculated output along with any breakdowns, charts, or explanations provided to understand what the numbers mean for your situation.

Frequently Asked Questions

What is the Burn Rate Calculator?

The Burn Rate Calculator is a free browser-based tool on ConvertCrunch. Estimate monthly burn and runway from current cash balance and operating spend. Free online, browser-based tool with instant results and no signup. It requires no downloads, installations, or account signups. Simply enter your values and get instant, accurate results. The tool is designed for quick calculations and informed decision-making, whether you are a professional, student, or everyday user looking for reliable answers.

How do I use the Burn Rate Calculator?

Using the Burn Rate Calculator is straightforward. Enter your values into the input fields provided on the page, then calculate or adjust parameters to explore scenarios. Most processing happens locally in your browser. If a feature uses a third-party service, the tool identifies that connection and the privacy policy explains it. Most users get the answers they need in under a minute.

Is the Burn Rate Calculator free to use?

Yes, the Burn Rate Calculator is completely free to use with no account signup, email requirement, or premium tier. Most calculations run locally in your browser. Features that depend on live data or a third-party service require a network connection and are identified in the tool. You can use it as many times as you need for personal, educational, or professional purposes.

How accurate is the Burn Rate Calculator?

The Burn Rate Calculator uses standard financial formulas widely accepted in business planning and analysis. Results depend entirely on the accuracy of the inputs you provide. Real-world outcomes may differ due to market conditions, unforeseen costs, and other variables not captured in the model. Use the results as a planning baseline and adjust assumptions based on your specific business context and industry benchmarks.

Explore Related Resources

Go deeper with workflow guides, side-by-side comparisons, and reusable embeds connected to this tool.

Guides

Best Free Business Planning Calculators Online (2026)

Comparisons

Burn Rate Calculator vs Cash Flow Projection Calculator

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