Calculators that show their work
Plug in real strikes, real premiums, real days to expiry. See exactly what a trade is risking and earning, every break-even, every annualised return. Free, no signup, runs in your browser — and the math is open so you can check it.
Income strategies
Sell premium against shares or cash to generate yield.
Covered-call calculator
Model a covered call in seconds — see your break-even, max profit, max loss and annualised yield with a live payoff diagram.
Cash-Secured Put calculator
Sell a put against cash, collect premium, get paid to wait for your buy price.
Wheel Strategy calculator
Project the full CSP-to-covered-call wheel cycle, end to end, on one timeline.
Multi-leg structures
Combine two or more options for defined-risk, neutral or directional setups.
Iron Condor calculator
Model an iron condor in seconds — see your profit zone, max loss, both break-evens and annualised return on risk.
Credit Spread calculator
Two-leg credit spreads — bull put or bear call, directional, defined risk, side-by-side.
Pricing & Greeks
Black-Scholes fair value, sensitivities, implied-volatility solving.
Black-Scholes & Greeks calculator
Fair value plus all five Greeks for any option, with live sensitivity charts.
Probability tools
What the option chain implies about future price movement.
Expected Move calculator
What the chain thinks the stock will move — derived from the ATM straddle.
Utility calculators
Building blocks that work across any strategy.