Finance Calculator
Runway & Burn Rate
Estimate net burn, runway months, and an approximate runway date from current cash, revenue, and expenses.
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Current cash profile
Current cash available to fund operations.
Defaults to 0 if you are pre-revenue.
Use total monthly operating spend.
Used only for the projection note, not the core runway formula.
Live results
Snapshot
Runway status
Need inputs
Enter expenses or revenue to model burn.
Runway uses a flat-burn estimate. Collections timing, hiring changes, and one-off spend can materially move the outcome.
Runway & Burn Rate Calculator
Use this calculator to estimate how long your cash lasts based on current revenue and monthly expenses. It gives a quick operating view, not a full forecast.
Explanation
Runway is calculated from cash on hand divided by net burn. Net burn is monthly expenses minus monthly revenue. If revenue exceeds expenses, the business is cash-flow positive instead of burning cash.
When to Use
Use this when planning hiring, reducing spend, preparing for fundraising, or checking whether recent revenue changes materially affect survival time.
Common Mistakes
Founders often exclude one-off costs, underestimate payroll taxes, or use booked revenue instead of actual cash collections. Those choices can make runway look longer than it really is.
FAQ
Runway refers to the number of months a startup can continue operating before it runs out of cash, based on its current net burn rate. It is calculated by dividing cash on hand by monthly net burn (expenses minus revenue).
Gross burn is the total amount a company spends each month. Net burn subtracts monthly revenue from gross burn. Net burn gives a more accurate picture of how quickly cash reserves are being depleted.
Most early-stage startups aim for 12 to 18 months of runway. This gives enough time to execute milestones, improve metrics, and raise the next funding round without operating under immediate financial pressure.