Options Profit Calculator
Calculates the net profit or loss on a long call or put options trade at expiration. Use it to evaluate whether an options position is worth entering given the premium cost.
About this calculator
An options contract gives the holder the right to buy (call) or sell (put) 100 shares at the strike price. Each contract costs a premium paid upfront, which is the maximum loss for a long position. At expiration, profit for a call = [max(0, stockPrice − strikePrice) × 100 × contracts] − (premium × 100 × contracts). For a put, replace the intrinsic value with max(0, strikePrice − stockPrice). The max(0, …) function ensures the option is only exercised when it is in-the-money; otherwise it expires worthless and you lose the premium. Break-even for a call is strikePrice + premium, and for a put is strikePrice − premium.
How to use
You buy 2 call contracts with a $50 strike price, paying a $3 premium per share, when the stock is at $45. At expiration the stock rises to $56. Intrinsic value per share = max(0, 56 − 50) = $6. Gross payoff = $6 × 100 × 2 = $1,200. Premium paid = $3 × 100 × 2 = $600. Net profit = $1,200 − $600 = $600. Had the stock finished below $50, both contracts would expire worthless and you'd lose the full $600 premium.
Frequently asked questions
How do you calculate profit on a call option at expiration?
Profit = [max(0, stockPrice − strikePrice) × 100 × contracts] − (premium × 100 × contracts). The max(0,…) term captures the intrinsic value; if the stock is below the strike the option expires worthless. Multiply by 100 because each standard contract covers 100 shares. Subtracting the total premium paid gives your true net gain or loss.
What is the maximum loss when buying a put or call option?
For a long option position, the maximum loss is always limited to the total premium paid — that is, premium × 100 × contracts. Unlike selling options or holding stock, you cannot lose more than what you paid upfront. This defined-risk characteristic is one reason traders use long options to speculate with controlled downside exposure.
What is the break-even price for a call or put option?
For a call, break-even = strikePrice + premium per share. For a put, break-even = strikePrice − premium per share. At expiration, the stock must move beyond that threshold for the trade to be profitable. Understanding break-even helps you assess whether a realistic price move can cover the premium cost before committing capital.