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Startup Runway Calculator — Months Until Cash Runs Out

Free runway calculator. Cash on hand + monthly net burn → months of runway + exhaustion date. VC rule: start raising when you have 9-12 months left.

Runway Calculator

Months of runway

30.0

Years

2.50

Cash runs out

January 2029

VC rule of thumb: start raising the next round when you have 9-12 months of runway left. Below 6 months and you're negotiating from weakness. Above 18 months and investors wonder why you need money at all.

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About this tool

The VC rule of runway

Start raising your next round when you have 9-12 months of runway left. Below 6 months and you're negotiating from weakness; investors smell desperation. Above 18 months and they wonder why you need money at all.

How to use the Startup Runway Calculator

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the Startup Runway Calculator above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the Startup Runway Calculator.

Is the Startup Runway Calculator free to use?

Yes. The Startup Runway Calculator on 7BusyBoss is completely free — no signup, no paywall, no usage cap.

Do I need to sign up to use the Startup Runway Calculator?

No. The Startup Runway Calculator works instantly in your browser — no account needed. Signing in with Google is optional and only unlocks features like saving favorites and higher AI build limits.

Does the Startup Runway Calculator work on mobile?

Yes. Every tool on 7BusyBoss is mobile-responsive and works in any modern browser — Chrome, Safari, Firefox, Edge — on phones, tablets and desktops.

Is my data safe when I use the Startup Runway Calculator?

Yes. The Startup Runway Calculator runs entirely in your browser — your inputs never leave your device unless the tool explicitly fetches public data (e.g. currency rates). We don't store the values you type.

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