Definition
An Excel spreadsheet that startup founders compulsively update every day to determine exactly when they'll run out of money—a real-time anxiety meter.
Example Usage
I've updated the runway calculator 73 times today; it now shows we're out of money in exactly 4.2 months.
Origin
Practical tool that emerged from startup necessity, not formal terminology but colloquial in startup culture.
Fun Fact
Most founders report that their runway calculator alternates between hope and panic depending on weekly spending and that day's market news.
Source: Startup operations and finance terminology
Related Terms
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See “Runway Calculator” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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