FireMathLab is a free suite of 30+ FIRE and retirement calculators that take the math seriously: Monte Carlo simulation, backtests over 124 years of market history, crash tests, withdrawal strategies and a rich-broke-dead view. No bank linking, and every tool works without an account: type your numbers and watch your freedom date move in real time. Guided setup walks beginners through each input, 18 currencies, every formula public on the methodology page. Your data stays your
