Tools & Calculators
Interactive companions to the lessons. Every calculator shows hypothetical illustrations with labeled, editable assumptions — none of them predict or recommend anything, and actual investment returns vary and may be negative.
Compound Growth Calculator
Model contributions compounding over time, with an optional delayed-start comparison. Companion to the compound interest lesson.
Work-Hours Cost Calculator
Convert prices into hours worked at your wage — a plain way to weigh purchases and savings goals.
Market Data
Recent price history for two broad-market index ETFs, presented as illustrative benchmarks with source attribution.
Housing Data Explorer
U.S. median home sale prices (FRED) against an editable inflation baseline — the real-versus-nominal lesson, live.
Stock Comparison
Historical price paths, volatility, and moving averages for up to five securities — with every metric defined in plain English.