I built FIRECalculatorHQ after running the numbers on my own path to financial independence. The site covers Standard, Coast, Barista, Lean and Fat FIRE plus a Trinity Study-based safe withdrawal rate tool. I write about the math behind early retirement — FIRE numbers, withdrawal rates, the 4% rule, and how sequence-of-returns risk changes the math for anyone planning a 30–40 year retirement. No financial credentials, but I know the models well enough to build tools around them.