00 / Free tool
Startup Runway Calculator
Project how long your cash will last, accounting for revenue growth and expense changes over time.
01 / Calculator
Startup Runway Calculator
Inputs
Scenario Modeling
Results
Months of Runway
16
Cash runs out February 2028
Cash-Zero Date
February 2028
Current Net Burn
$35,000
per month
Cash at Month 6
$292,493
Cash at Month 12
$97,005
Cash Balance Projection
02 / Notes
How it works
Runway is the number of months until your business runs out of cash, accounting for both revenue and expenses. Unlike a simple 'cash ÷ burn rate' calculation, this tool models revenue growth and expense changes over time, giving you a much more realistic projection.
Formula
Simple Runway = Cash Balance ÷ (Monthly Expenses - Monthly Revenue) With Growth: Month N Cash = Cash₀ - Σ(Expenses × (1+g)ⁿ - Revenue × (1+r)ⁿ) Runway = first month where Cash ≤ 0
Why it matters for your business
Runway determines when you need to fundraise, cut costs, or become profitable. Most startups that die do so because they run out of cash — not because the idea was bad. Knowing your runway with realistic growth assumptions is the difference between a planned pivot and a panic.
04 / Next step
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