Options Profit Calculator
Model any single call or put, long or short. Get breakeven, max profit and loss, the Greeks, and a payoff chart at expiration and today.
- Cost
- $0
- Breakeven at expiry
- $0
- Max profit
- $0
- Max loss
- $0
- P&L if the stock is at at expiration
- $0
Position Greeks (today)
- Delta
- 0
- Gamma
- 0
- Theta / day
- 0
- Vega / 1% IV
- 0
Greeks are in dollars for the whole position (contracts × 100 shares).
How to read the results
Buying a call profits when the stock rises above strike + premium. Your loss is capped at what you paid. Buying a put profits when the stock falls below strike − premium, also with a capped loss.
Selling flips the picture: you collect the premium up front and keep it if the option expires worthless, but a naked short call has no cap on its loss and a short put can lose almost the full strike price.
The Greeks in one line each
- Delta: dollars gained or lost for each $1 move in the stock
- Gamma: how much delta changes for each $1 move
- Theta: dollars gained or lost per day from time decay alone
- Vega: dollars gained or lost for each 1-point change in implied volatility
Frequently asked questions
How is options profit calculated at expiration? +
At expiration an option is worth only its intrinsic value: for a call, the stock price minus the strike (or zero); for a put, the strike minus the stock price (or zero). Profit is that value minus the premium paid, times 100 shares per contract. Sellers get the mirror image.
What's the breakeven price? +
For calls, breakeven is strike + premium. For puts, it's strike − premium. The stock has to move past that point by expiration for a buyer to profit.
What is the dashed "today" line? +
It estimates what the position would be worth right now at each stock price, using the Black-Scholes model with your implied volatility and days to expiration. Before expiration an option still has time value, so its P&L curve is smoother than the hard-angled expiration line.
Where do I find implied volatility? +
Your broker's option chain shows IV for each strike. If you don't have it, use the "estimate premium" button with a rough IV to see what a fair price might be, or enter the actual premium you see quoted.
Does this handle spreads or early assignment? +
No. This tool covers a single call or put. It also uses the European-style Black-Scholes model, which ignores early exercise and dividends, so the "today" estimate is approximate for American options on dividend payers.
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