Easy Option Calculator is very easy to use, enter following values, and click button “Call”, or “Put” to get option prices and option Greeks:
Underlying price ($), exercise price ($), days until expiration (days), interest rate (%), and volatility (%).

click "Reset" button to reset values.

The Black–Scholes model is a mathematical model of a financial market containing certain derivative investment instruments. From the model, one can deduce the Black–Scholes formula, which gives the price of options. It is widely used by options market participants. Many empirical tests have shown the Black-Scholes price is “fairly close” to the observed prices.