GreenLine Yards, a landscaping crew, holds $31,500 in cash against a monthly burn of $5,700, everything included: rent, gear, software, and the owner draw. That is 5.5 months of runway at current burn. Above the four-month line, which buys the freedom to think in seasons instead of weeks.
Runway = cash on hand ÷ monthly burn, using your heaviest recent burn month rather than your cheapest. The full reasoning, including what to do at each runway level, lives in the main runway guide; the calculator runs it with your numbers in your browser.
The twist for landscaping and trades businesses
Seasonal businesses should read runway at the season trough, not the annual average. The question is never whether June survives; it is whether the cash on October 1 carries the crew to March.