Investing Tools
Practical calculators that help with real investing decisions. Each tool states its assumptions plainly and is meant as a planning aid, not financial advice.
Compound Interest Calculator
Project how an investment grows with monthly contributions and compounding, and see how much of the balance is growth versus what you put in.
Investment Fee Drag Calculator
See how much a fund's expense ratio or advisory fee quietly costs you over decades — the same return, with and without the fee.
Dividend Reinvestment (DRIP) Calculator
Compare reinvesting dividends versus taking cash over time, with dividend growth and share-price growth built in.
How to Choose a US Stock Broker (2026)
A decision framework plus a side-by-side comparison of the major US brokers — now that commissions are $0, what actually separates them.
Position Size Calculator (Risk-Based)
Size a trade from your account, the risk you'll take per trade, and your entry and stop — so every position's downside is fixed.
CAGR Calculator (Annualized Return)
Turn a starting value, ending value, and holding period into the compound annual growth rate that compares investments on equal terms.