Burn & runway (months of cash)
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About Burn & runway (months of cash)
Runway is a simple story: if you are spending your cash balance on net operations faster than you refill it, months of runway = cash / monthly net burn. This tool does that division. Net burn is whatever you load in—ideally the net cash the company expects to lose per month at current hiring and revenue, not a single vendor invoice. Pair it with the MRR/ARR and unit economics tools on this site for a fuller picture; still, board decisions need your finance model, not a web form.
Key Features
- Two numbers: cash and net monthly burn
- Result in months with one decimal for quick readouts
- In-browser, no data stored
Use Cases
- Slide decks and blog posts on founder runway at a high level
- Sanity-check a spreadsheet you already have
Pro Tips
- Revenue and hiring both move—rerun the scenario monthly
- If you are already profitable, runway math may be less relevant than return on new investment
Frequently Asked Questions
Is this “mortgage runway”?
No. This is startup / SaaS context: how long the company can operate on current net burn.
What about interest income?
Not modeled here. Add it in your own sheet if it matters to your float.