Free calculators

Visualize options interactively: payoffs, Greeks, spreads

For those who want to understand options before trading them. Free interactive calculators based on Black-Scholes and Garman-Kohlhagen.

5.0/5 on 177 reviews · 216 members · 17 years desk · Zero broker affiliation

« 17 years of derivatives desk. Zero broker affiliation. The market as it really is. »

Calculators

📊 Payoff calculator: P&L at expiry for call, put, spreads (bull, bear, iron condor, butterfly).
🧮 Greeks calculator: delta, gamma, theta, vega over price range.
📈 Multi-leg strategies: iron condor, butterfly, calendar, diagonal.

Book FX Traders vs Brokers ($9.99) CH13-18 + formation Derivatives Trading ($60/month, Bloomberg Pro Terminal).