What this calculator does
Every input on this runway calculator maps to a real decision, so the output is something you can act on immediately, not a rough ballpark you'll have to double-check elsewhere.
Runway is how many months until you run out of cash at current burn.
How to use the Runway Calculator
- Enter your values in the fields on the left.
- Results update automatically.
- Use the action buttons to copy, share or print.
The formula
Runway = Cash / Burn
Worked example
$400k / $33k = 12 months.
Common mistakes
- Ignoring seasonality
- Not modeling revenue growth
- Panic hiring when runway is short
When to use it
Use for fundraising and hiring decisions.
Pro tips for the Runway Calculator
- Round-trip check: reverse the inputs to confirm the formula matches what you'd compute by hand.
- Bookmark this page: the URL and inputs are all you need to reproduce the exact result later.
- Save your favorite scenarios by clicking the star icon — they're stored locally, no account needed.
Frequently asked questions
›Ideal runway?
18+ months preferred.
›Fundraise when?
Start 6 months before runway ends.
›Extend runway?
Cut costs or accelerate revenue.
›Growth-adjusted runway?
Assume net burn declines over time.
›Zombie mode?
Cut to profitability if fundraising fails.
›Where does the formula come from?
The formula shown in the "How it works" section is the same one you'll find in standard business & marketing references — no proprietary tweaks or hidden weightings.
›Can I embed the Runway Calculator on my site?
Embedding isn't public yet, but you can link directly to this page — the URL is stable and shareable.
Embed this calculator
Drop the Runway Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.
<iframe src="https://calcpilot.tools/calculators/runway-calculator?embed=1" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;max-width:720px;" loading="lazy" title="Runway Calculator — CalcPilot"></iframe>Related calculators
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