Tools
Calculators that show their work.
Each tool runs entirely in your browser — your inputs never leave your device. Pick one to begin.
Available tools
- Available nowRetirement
Monte Carlo Retirement Calculator
Run 10,000 simulations of your retirement plan in your browser. See how often the plan survives, what the bad cases look like, and where the assumptions matter most.
Open tool - Available nowFIRE
FIRE Calculator
Translate your annual spending into a financial-independence target with a valuation-aware safe withdrawal rate. Runs entirely in your browser.
Open tool - Available nowRetirement
Bucket Strategy Planner
Plan and stress-test a two-bucket retirement withdrawal strategy — a stability bucket funds spending, a growth bucket refills it — with research-backed guardrail rules, Monte Carlo success rates, and a January-2000 dot-com stress test.
Open tool - Available nowInvesting
Investment Calculator
Project how contributions and compounding grow an investment — or solve for the contribution, return, starting amount, or time you need to hit a goal. Compare scenarios side by side.
Open tool
Coming next
The toolkit is growing. These are the next ones planned.
- Coming soonReal estate
Rental Property ROI
Run the numbers on a rental — cash flow, cap rate, and long-run total return — before you commit.