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Free Options Tools
Standalone calculators. Computed live in your browser. Nothing tracked, no account needed.
Options Greeks Calculator
Black-Scholes pricing + delta, gamma, theta, vega, rho for any contract. Live computation, no signup.
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Position Size Calculator
Fixed-fractional + Kelly criterion sizing for options trades. Cap loss-if-stopped to your stated risk budget.
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Implied Volatility Calculator
Back-solve IV from observed option price. Bisection-based, robust to flat-vega regions where Newton-Raphson breaks.
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Max Pain Calculator
Find the strike where the most options expire worthless. The classic OPEX-week pin-finder for any chain.
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Probability Calculator
P(touch), P(ITM), and probability-of-profit for any strike. Black-Scholes math, instant computation.
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