What this calculator solves
An options profit calculator shows how much a long or short call or put could gain or lose at expiration for one assumed underlying price. It is useful for a first pass before you model volatility, time, Greeks, and multi-leg strategy behavior.
Formula
Call intrinsic value is max(stock price - strike, 0). Put intrinsic value is max(strike - stock price, 0). For a long option, profit per share equals intrinsic value minus premium. For a short option, profit per share equals premium minus intrinsic value.
Example
If you buy one 100 call for $4 and the stock closes at $112, the option is worth $12. Net profit is ($12 - $4) x 100 = $800 before fees and slippage.
Risk reminder
Expiration payoff is not the same as live mark-to-market. Before expiration, implied volatility, time decay, bid/ask spread, assignment risk, and liquidity can all change the result.