Startup Burn Rate & Runway Calculator
Calculate monthly burn rate and runway from cash, revenue, and expenses.
Last reviewed by the Radiatus Cloud team
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Work out your burn rate and runway
For a startup, how fast cash is spent and how long it lasts are existential numbers. This calculator computes monthly burn rate and runway from your cash, revenue and expenses, so you know how long you have.
Why burn and runway drive decisions
Burn rate is how much cash a company loses each month, expenses minus revenue, and runway is how many months the remaining cash covers that burn. Together they tell a startup its most important fact: the date it runs out of money unless something changes. Every major decision, hiring, spending, when to raise funding, is governed by runway, because a company must raise or reach profitability before the runway ends. Knowing these numbers precisely, and watching them, is the difference between managing the situation and being surprised by it.
A planning estimate
This is an estimate for planning from the figures you enter, not financial or business advice. Real outcomes depend on factors beyond any single calculation, so treat the result as a guide. The calculation runs entirely in your browser, so your figures are never uploaded and stay on your own machine, which matters for business numbers you would not want to share.
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Frequently Asked Questions
What is burn rate?
How much cash a company loses each month, its expenses minus its revenue. A company with more expenses than revenue is burning cash.
What is runway?
How many months the remaining cash lasts at the current burn rate. It is the time before the company runs out of money unless something changes.
Why are these numbers existential?
Because a startup must raise funding or reach profitability before runway ends. Every major decision is governed by how much runway remains.
How are they calculated?
Burn is monthly expenses minus revenue; runway is cash divided by burn, giving the months of operation remaining.
Is my data uploaded?
No. The calculation runs entirely in your browser.
Privacy & Security
Calculated locally in your browser. No data is sent to any server.
How to Use
Enter cash, monthly revenue, and monthly expenses to compute runway.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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BusinessEstimate what a data breach would cost from records exposed, cost per record, days to detect and hours of downtime, split into direct and indirect costs.