Option Premium & Greeks Calculator

Black-Scholes fair value of a call or put, with Delta, Gamma, Theta, Vega and Rho.

How the Option Premium & Greeks Calculator works

The Black-Scholes model prices a European option from the spot price, strike, days to expiry, risk-free rate and implied volatility (IV). The Greeks show how the premium reacts: Delta to a ₹1 move in the underlying, Gamma to changes in Delta, Theta to one day passing, Vega to a 1% change in IV and Rho to a 1% change in interest rates.

Option Premium & Greeks Calculator formula

Call = S·N(d₁) − K·e^(−rT)·N(d₂) · Put = K·e^(−rT)·N(−d₂) − S·N(−d₁) · d₁ = [ln(S/K) + (r + σ²/2)T] ÷ (σ√T), d₂ = d₁ − σ√T

Results are estimates for illustration only and not financial advice.

How to use the Option Premium & Greeks Calculator

Enter the spot price, strike price and days to expiry.
Enter the volatility and interest rate.
See the theoretical call and put premium along with delta, gamma, theta and vega.

Option Premium & Greeks Calculator: FAQs

Why does the market premium differ from this value?

Market prices reflect the IV traders are paying, dividends and demand. Enter the IV quoted on the option chain to get a value close to the traded price.

Are Indian index options European?

Yes. NSE index options (Nifty, Bank Nifty) and stock options are European-style and can only be exercised at expiry, which suits the Black-Scholes model.

Is the Option Premium & Greeks Calculator free to use?

Yes. The Option Premium & Greeks Calculator on IPO Darbaar is free, needs no sign-up and works on mobile and desktop.

Is my data saved anywhere?

No. All calculations run in your browser; the numbers you enter are not sent to or stored on our servers.

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