Tools
Numbers you can check
Practical calculators for saving, investing and planning a home purchase. Each one states its assumptions, keeps the inputs visible, and shows the arithmetic rather than a single opaque answer.
Education only. These are deterministic illustrations, not forecasts, loan offers, tax advice, or individualized recommendations.
Compound interest / APY
A starting balance, a nominal rate or APY, and an explicit contribution schedule. See the yearly balance and the assumptions behind it.
Open calculator →Long-term investingInvestment growth
Monthly contributions, a constant return scenario, an annual fee and inflation. See nominal growth, fee drag and purchasing power side by side.
Open calculator →Home planningMortgage planning
Principal and interest, property tax, insurance, PMI, HOA and extra principal. See a yearly amortization and the first-month payment.
Open calculator →How these work
Inputs, formula, assumptions
Every projection uses a fixed, documented schedule. Rates and fees stay constant; contributions and payments happen when you say they do. The result table keeps the parts visible so you can check the arithmetic.
What they are not
Not a promise or a product
Markets do not earn a constant return, mortgage escrow changes, and taxes depend on facts we do not collect. Use these tools to ask better questions, then check the primary document or a qualified professional.
Looking for a definition first? Start with Learn. For a published figure, use the Method.