Startup Runway Calculator
How many months of runway your cash on hand gives you, and the projected out-of-cash date.
Every calculation runs locally in your browser. Real burn rate fluctuates month to month — treat this as a snapshot, and revisit it as your numbers change.
Net monthly burn
$40,000
Runway
12.5 months
Projected out of cash
Sep 2027
For informational and educational purposes only — not financial, investment, or tax advice, and not a substitute for consulting a qualified professional about your specific situation. TrueMeasureKit is not liable for decisions made based on these results. See our Terms of Service.
Runway is about net burn, not gross spending
Runway measures how long your cash on hand lasts at the current net burn rate — expenses minus revenue, not expenses alone. A company spending $55,000/month with $15,000/month in revenue has a $40,000 net burn, not $55,000, so its cash lasts longer than the raw expense number suggests. Because burn rate rarely stays constant, most operators recalculate this monthly rather than treating it as a fixed number.
Frequently asked questions
What's the difference between gross burn and net burn?
Gross burn is total monthly spending. Net burn is spending minus any revenue coming in — net burn is the figure that actually determines runway, since revenue extends how long cash on hand lasts.
Does this assume burn rate stays constant?
Yes — it projects the out-of-cash date assuming your current monthly net burn holds steady. If you're planning to scale spending or revenue, rerun the numbers with updated assumptions rather than treating this as a fixed forecast.