How long is your runway?
Cash in the bank, monthly expenses, monthly revenue. Get the number that actually matters — how many months until you’re out of money, and the date it happens.
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What is the Startup Runway Calculator?
The Startup Runway Calculator is a free cash runway calculator that answers the one question every founder loses sleep over: how long until I run out of money? Enter your cash in the bank, your monthly expenses, and your monthly revenue, and it returns your runway in months along with the estimated date your account hits zero. It's the same simple math VCs and accelerators use — cash divided by net monthly burn — but instant, free, and with no spreadsheet required. If revenue already covers your costs, it tells you you're "default alive" instead.
How to use it
- Enter how much cash you have in the bank right now.
- Add your average monthly expenses and your average monthly revenue.
- Hit Calculate to see your runway in months and the date you'd run out of money — or tap "Try a sample" to see how it works.
Frequently asked questions
What is a startup runway calculator?
A startup runway calculator tells you how many months your business can keep operating before it runs out of money. It takes your cash in the bank, divides it by your net monthly burn (expenses minus revenue), and returns your runway in months plus the date you'd hit zero.
How do I calculate my cash runway?
Cash runway = cash in the bank ÷ net monthly burn, where net monthly burn is your monthly expenses minus your monthly revenue. This cash runway calculator does the math for you and also shows your estimated out-of-cash date so you know exactly how long until you run out of money.
What does default alive mean?
"Default alive" means your monthly revenue already covers your monthly expenses, so your burn is zero or negative and your runway is effectively infinite. If you're default alive, the runway clock isn't running — the calculator flags this instead of showing a months figure.
Is this runway calculator free?
Yes — this startup runway calculator is completely free, runs in your browser, and needs no login or signup. Enter your cash, expenses and revenue and it instantly shows how long until you run out of money.
More free tools for X creators: Ramen Profitability · MRR Goal · all 30 free tools. Or try Slap Post to schedule and post your content automatically.