Investing
Loan, savings, investing and planning calculators using standard amortization mathematics, transparent assumptions and cited conventions.
Compound Interest Calculator
Calculate compound interest with A = P(1+r/n)^nt. Choose annual, quarterly, monthly or daily compounding. Includes Rule of 72 doubling-time estimate.
IRR Calculator
Calculate the Internal Rate of Return (IRR) for any series of cash flows using Newton-Raphson. Enter comma-separated values; first is typically negative.
Investment Calculator
Project investment growth from an initial amount and monthly contributions, with inflation-adjusted real value. Educational estimates, not advice.
ROI Calculator
Calculate return on investment (ROI) and the annualized return from amount invested, amount returned and holding period. Includes worked example.
Future Value Calculator
Calculate the future value of a present sum with compound growth: FV = PV(1+r)^n. See total growth over any number of periods, with a worked example.
Present Value Calculator
Calculate the present value of a future sum by discounting: PV = FV/(1+r)^n. See how much a future amount is worth today, with a worked example.
CAGR Calculator
Calculate compound annual growth rate (CAGR) from beginning value, ending value and years. Compare investments with the standard smoothed metric.
Dividend Calculator
Calculate dividend yield and projected annual and monthly dividend income from share price, dividend per share and number of shares held.