Tool · Downloadable spreadsheet, 15 to 30 minutes to fill in

Startup Runway Calculator Template (Excel and Google Sheets)

The Startup Project Free Beginner

Once you accept that the spreadsheet lied about your cash, this template makes the timing gap concrete: you enter your real starting cash, revenue, and monthly expenses and it lays out burn, net cash, and runway month by month. It is free with no email wall, and the scenario tabs let you test what happens if you cut a fixed cost or push a hire out. Plug in your actual numbers rather than trusting a single average burn figure.

  • Runway is just current cash divided by net monthly burn, and seeing it laid out month by month exposes the exact month you run dry.
  • Because it separates revenue, headcount, and expenses, you can watch how trimming one fixed cost (a hire, a tool, an office) moves your runway more than chasing a few more sales.
  • Model conservative, base, and aggressive cases so you are not planning off a single optimistic line.

It answers 2 questions

  1. What does healthy cash flow actually look like for a bootstrapped business, and how do I stop confusing revenue with money in the bank?
  2. My unit economics work on a spreadsheet but I'm bleeding cash every month. Why the disconnect and what do I fix first?

Read with it

  1. A behavioral, dead-simple cash-management system used by over a million businesses to stay permanently profitable. Perfect for... mikemichalowicz.com Book · book (~224 pages) Profit First: Transform Your Business from a Cash-Eating Monster Mike Michalowicz
  2. This is the clearest walk-through of the exact trap you are in: your spreadsheet shows a healthy per-unit margin because unit... Toptal Article · About a 15 minute read Don't Scale an Unprofitable Business: Why Unit Economics (Still) Matter Toby Clarence-Smith
  3. Video · About 6 minutes How to calculate burn rate, runway, and growth rate Tim Brady
  4. Video · Short explainer video, a few minutes Cash Flow vs. Profit: What's the Difference? HBS Online
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