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Free Financial Calculators
Free calculators built for stock and options traders — profit planning, position sizing, returns, and taxes. No signup required.
Trading & Investing Tools
Options Profit Calculator
Visualize P/L diagrams and Greeks for calls and puts.
Position Size Calculator
Determine the right position size based on your risk tolerance.
Compound Interest Calculator
See how your investments grow over time with the power of compounding.
Investment Return Calculator
Calculate total return, CAGR, and compare your performance against the S&P 500.
Capital Gains Tax Calculator
Estimate federal and state taxes on your investment gains.