Option Trade Profit/Loss Calculator
Estimate your option position outcome at expiration using strike, premium, contracts, and a target stock price.
How to use this option trade calculator
This tool gives you a quick expiration-day estimate for a single-leg options trade. Pick whether your contract is a call or put, and whether your position is long (you bought it) or short (you sold it). Then enter your strike, premium, contracts, and the stock price you want to test.
The calculator instantly returns your estimated profit/loss (P/L), breakeven price, and a quick scenario table so you can see how the position behaves as price changes.
What each input means
Option type: call vs put
- Call: Gains intrinsic value when stock price is above strike.
- Put: Gains intrinsic value when stock price is below strike.
Position: long vs short
- Long option: You paid premium up front. Your max loss is usually the premium paid (plus fees).
- Short option: You received premium up front, but take on assignment risk.
Premium, contracts, and fees
Premium is entered on a per-share basis, but options settle in blocks of 100 shares per contract. So a $2.50 premium with 3 contracts is:
- $2.50 × 100 × 3 = $750 total premium value
Fees are added as a flat amount per contract to keep the model simple and practical.
Core formulas behind the calculator
Call intrinsic value per share: max(S - K, 0)
Put intrinsic value per share: max(K - S, 0)
Where S is stock price at expiration and K is strike price.
- Long position P/L: Intrinsic value - premium paid - fees
- Short position P/L: Premium received - intrinsic value - fees
Breakeven is estimated from strike and premium, with a small fee adjustment per share.
Quick interpretation guide
If your result is positive
The chosen expiration price produces a net gain after premium and fees. Positive does not mean low risk; it only means the selected scenario is favorable.
If your result is negative
The trade loses money in that scenario. Use the scenario table to find where performance improves and compare it with your actual market thesis.
Important limitations
- This is an expiration-only model; it does not include time value before expiration.
- It does not model Greeks in real time (delta, theta, vega, gamma).
- Margin requirements for short options vary by broker and are not estimated here.
- Early assignment risk (American options) is not included in the math.
Risk management checklist for options traders
- Define max acceptable loss before entering the trade.
- Use smaller size on higher-volatility underlyings.
- Plan exits for both profit and loss scenarios.
- Know earnings dates, ex-dividend dates, and major macro events.
- Avoid holding oversized short premium positions into binary events.
Final thoughts
An option trade calculator helps convert a trade idea into numbers you can stress-test quickly. If you use it consistently before entry, you can improve decision quality, avoid hidden risk, and align each trade with a clear plan.