Startup Runway Calculator
How many months your cash lasts, with revenue growth.
How to use the Startup Runway Calculator
- Enter your figures in the fields above — results update instantly as you type.
- Choose your currency symbol (the maths is the same in any currency).
- Use Share result to save a link that reloads your exact inputs, or Print for your records.
- Compare scenarios by changing one input at a time and noting how the main result moves.
Formula
Each month: Cash = Cash + Revenue − Expenses; Revenue grows by g% Simple runway = Cash ÷ (Expenses − Revenue)Worked example
120,000 cash, 15,000 expenses and 3,000 revenue gives 10 months of simple runway; at 5% monthly revenue growth the runway extends to about 11 months.
Frequently asked questions
Gross or net burn?
Net burn (expenses minus revenue) is what drains cash; gross burn shows your cost base.
How do I extend runway?
Cut the largest fixed costs first, raise prices, or collect receivables faster.
Learn more
Assumptions & limits
Results are estimates based on the inputs you provide and the formula shown, rounded for display. They do not account for every fee, tax rule or market condition. This tool is educational and is not financial, tax or legal advice — confirm important decisions with a qualified professional.
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