Stock Options Calculator
Powerful, free, and easy to use
Stock Options Calculator
Calculate option prices and Greeks using the Black-Scholes model. This advanced calculator helps you understand option pricing, risk metrics, and potential outcomes.
Option Parameters
Understanding Option Greeks
Delta (Δ)
Measures how much the option price changes with $1 change in underlying asset price.
Gamma (Γ)
Rate of change of delta. Shows how stable delta is.
Theta (Θ)
Time decay. How much value the option loses each day.
Vega (V)
Sensitivity to volatility. How much price changes with 1% volatility change.
⚠️ Important Notes
- • Black-Scholes assumes constant volatility and risk-free rates
- • Real market conditions may differ from model assumptions
- • Options trading involves substantial risk and may not be suitable for all investors
- • This is for educational purposes only, not financial advice
關於Stock Options Calculator計算器
The stock options calculator prices call and put options using the Black-Scholes model and computes the key Greeks: delta, gamma, theta, vega, and rho. It helps traders and employees with stock option grants understand the theoretical value of their options contracts. The tool is also useful for modeling how changes in stock price, volatility, or time to expiration affect option premiums.
使用方法
Input the current stock price, option strike price, time to expiration, risk-free interest rate, and implied volatility percentage. Select whether you are evaluating a call or put option. The calculator returns the theoretical option price along with each Greek value and their interpretations. Adjust individual inputs one at a time to observe how the option price responds to changes in the underlying stock price, the passage of time, or shifts in market volatility.