Free tool · Cash management
How many months of cash do you have left?
Enter two numbers — your cash on hand and your average monthly net burn — and see how long your cash lasts at the current rate. It’s plain arithmetic on your own figures, not advice: nothing is sent anywhere, and a Certified ProAdvisor can help you turn it into a real forecast.
Cash runway is how long your cash lasts at your current burn: runway = cash on hand ÷ average monthly net burn. This tool does that one calculation on your own numbers. If you’re cash-flow positive, it says so — there’s no runway limit. It’s a model of your inputs, not financial advice, and it runs entirely in your browser. A fractional CFO conversation turns a single number into a forward forecast.
TechBrot Inc. · independent Certified QuickBooks ProAdvisor firm — not affiliated with Intuit Inc.
Cash runway, in five questions.
How do you calculate cash runway?
Runway in months = cash on hand ÷ average monthly net burn, where net burn is monthly expenses minus monthly revenue. If revenue exceeds expenses, net burn is zero or negative and there is no runway limit — you’re not running cash down. This calculator does that on your own numbers.
What is ‘net burn’?
The cash your business consumes each month after revenue — monthly expenses minus monthly revenue. Use an average over a few representative months that reflects real cash movements, not a single best or worst month and not accrual timing. An honest burn number is what makes the runway figure useful.
What’s a healthy amount of runway?
It depends on the business, but many advisors treat under ~6 months as a signal to act and aim to keep 12+ months for a growing company. The right target depends on how predictable your revenue is and how fast you can change spending — which is a fractional CFO conversation, not a fixed rule.
Is this calculator financial advice?
No. It’s a model of the two numbers you enter, run entirely in your browser. It assumes today’s burn holds steady, which real life doesn’t. Use it as a fast sanity check, then book a free discovery call if you want a Certified ProAdvisor to build a real forward forecast.
How do I extend my runway?
Three levers: increase revenue, cut burn, or raise cash. Which one to pull — and how — depends on your unit economics and growth stage. Accurate books make the trade-offs visible, and a fractional CFO models them; that’s exactly what the discovery call is for.
Calculate your cash runway.
Enter your figures; the result updates as you type. Everything stays in your browser — nothing is sent until you decide to book a call.
Cash runway
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Enter your cash on hand and average monthly net burn above.
This is a model of your own inputs, not financial advice. Real runway moves with revenue, hiring, and seasonality — a Certified ProAdvisor can build a forward forecast on your actual books.
Book the discovery callHow cash runway is calculated.
Runway answers one question: at the rate you’re spending net of revenue, how long until the cash runs out? The math is runway in months = cash on hand ÷ average monthly net burn, where net burn is your monthly expenses minus your monthly revenue. If revenue exceeds expenses, net burn is zero or negative — you’re not burning cash, so there’s no runway limit, and the tool says exactly that instead of dividing by zero.
The hard part isn’t the division — it’s getting an honest burn number. Burn should be an average over a few representative months, not your best or worst single month, and it should reflect real cash movements, not accrual timing. That’s why accurate books matter: a runway figure built on guesswork is worse than none.
This is a flat-rate snapshot — it assumes today’s burn holds steady. In reality burn changes with hiring, seasonality, and growth. Use the number as a sanity check, then build a real forward forecast. That’s a model of your inputs, not advice.
Your own numbers
in your browser
Runway figure
instant, honest math
Free discovery call
30 min · no obligation
A cash-flow forecast
on your real books
Where to go next.
Questions about cash runway.
Does this calculator store or send my numbers?
Why did it say ‘no runway limit’?
Should burn include one-time costs?
How accurate is this?
How can TechBrot help beyond the number?
Is TechBrot affiliated with Intuit?
From a number to a forecast
Know the number? Now build the plan.
Runway is a snapshot; a forecast is a plan. A free 30-minute discovery call with a Certified ProAdvisor builds a real cash-flow forecast from clean books — so you see the runway change before it surprises you. No hourly billing, no obligation.