Decision calculator
Startup Runway Calculator
Project monthly cash runway with revenue and expense growth, your cash-out month, break-even, and the burn cut or raise needed to hit a target runway.
Modeled result
Calculating…
Results update as you change the inputs.
Methodology and assumptions
Each month: expenses = (net burn + revenue) compounded by expense growth; revenue compounds by revenue growth; ending cash = starting cash − (expenses − revenue). Runway is the fractional month when cash falls to the minimum buffer, simulated for up to 120 months. The burn cut is a constant monthly expense reduction found by bisection; the raise is the largest cumulative cash shortfall within the target window. With zero growth this reduces to cash ÷ net burn.
Currency outputs are rounded to the nearest minor currency unit.
Pricing last verified:
Official source: U.S. Small Business Administration finance guidance
Frequently Asked Questions
What does the Startup Runway Calculator calculate?
Project monthly cash runway with revenue and expense growth, your cash-out month, break-even, and the burn cut or raise needed to hit a target runway.
How accurate is the Startup Runway Calculator?
It is a planning estimate based on the inputs, formula, assumptions, and sources shown on this page. Actual prices, invoices, taxes, discounts, and outcomes can differ.
Which pricing source does the Startup Runway Calculator use?
The calculator links to U.S. Small Business Administration finance guidance as its official source. The displayed pricing or reference data was last verified on 2026-10-01.
Are calculator inputs saved or sent to analytics?
Inputs are processed in your browser. Calculator values are not included in analytics events.