Calculators

Free, no signup, and every formula shown in full. We default to 7% real returns — not 10% nominal — so the numbers do not flatter you.

More calculators — FIRE, savings rate, CAGR, business valuation, break-even, and the path-specific tools — are shipping in the next version. Each one will show its formula, its working, and an inflation toggle where a future dollar amount is involved.