Burn Rate Calculator
A reliable burn rate calculator helps you understand how quickly your business is using cash and how much time you have to respond. For startups, agencies, and small companies watching every dollar, this kind of visibility matters. A simple view of gross burn, net burn, and runway can make budgeting, hiring, and fundraising conversations much clearer.
Why burn rate matters
Gross burn shows your total monthly operating expenses. Net burn goes a step further by factoring in revenue, giving you a more realistic picture of monthly cash loss. When you compare those numbers against your starting cash balance, you can estimate runway in months and spot pressure points early.
A faster way to estimate runway
This burn rate calculator updates in real time, so you can test scenarios as you type. Change revenue, adjust expenses, or compare different cash balances to see how runway shifts. That makes it useful for founder planning, finance reviews, and board prep.
Know when to act
If your runway drops below six months, that’s often a signal to cut costs, increase revenue, or raise capital sooner rather than later. And if revenue fully covers expenses, your business is cash-flow positive, which changes the conversation entirely. A good cash runway calculator turns those numbers into practical insight.
FAQs
What’s the difference between gross burn rate and net burn rate?
Gross burn rate is your total monthly operating spend before revenue is considered. Net burn rate adjusts that number by subtracting monthly revenue, which gives you a better sense of how quickly cash is actually leaving the business. If your company earns meaningful revenue, net burn is usually the more useful metric for runway planning.
Why does the calculator say my runway is infinite or undefined?
That message appears when your monthly revenue fully covers or exceeds your monthly operating expenses. In that case, your net burn rate is zero or negative, which means you’re not burning cash on a monthly basis. Rather than showing a misleading number, the tool labels the runway as effectively unlimited because current operations aren’t reducing your cash balance.
How accurate is a burn rate calculator for planning decisions?
It’s a strong starting point, but it works best as a snapshot rather than a full forecast. Real-world runway can shift because of hiring plans, seasonal revenue, one-time expenses, fundraising timing, or delayed payments. Use the calculator for quick visibility, then pair it with a more detailed cash flow model when you’re making major decisions.
