All tools
Free calculators that run entirely in your browser. No signup, and nothing you enter is uploaded.
Key terms used by the options tools
- Implied volatility (IV)
- How much movement the options market is pricing in, as a yearly percent.
- Days to expiration
- Calendar days until the option expires.
- Premium
- The option price per share.
- Greeks
- Delta, gamma, theta, vega and rho: measures of how an option's price reacts to the stock, time, volatility and rates.
See the full glossary.
Options tools
Options Profit Calculator
P&L at any price and date, up to 4 legs, Black-Scholes.
Black-Scholes & Greeks Calculator
Call/put prices and all five Greeks, with dividends.
Expected Move Calculator
1 and 2 SD ranges from IV, plus the straddle method.
Covered Call & Cash-Secured Put Calculator
Static, if-called, and annualized returns, breakeven.
Probability of Profit Calculator
Lognormal POP for single options and verticals.
Wheel Strategy Tracker
Log CSPs, assignments, and CCs. Adjusted basis, CSV export.
General tools
Risk/Reward & R-Multiple Calculator
Reward:risk, breakeven win rate, and position size.
Average Down & Cost Basis Calculator
Average cost across buys and shares needed to hit a target.
Capital Gains Tax Estimator (2026, US Federal)
2026 federal short vs. long-term tax, with NIIT.
Retirement & FIRE Calculator
Years to financial independence from your savings rate.
Dividend Income Goal Calculator
Portfolio needed for a dividend income target.
Compound Growth / DCA
See how monthly contributions grow over time.
Dividend Reinvestment (DRIP)
Model DRIP income and share growth.
Position Sizing
Size trades from account risk and stop-loss.
Looking for strategy explanations? See the Options Strategies guide.